feat(tradein/scraper-kit): migrate backfill-task imports to kit, Group C (#2310)

Migrates legacy app.services.scrapers.* imports to scraper_kit equivalents for
house_imv_backfill.py, avito_detail_backfill.py, cian_history_backfill.py,
ekb_geoportal_ingest.py, and yandex_detail_backfill.py, proving parity via
tests/support/parity.assert_parity per the epic's gate (#2304).

newbuilding_enrich_backfill.py and yandex_newbuilding_sweep.py are left fully
on legacy imports: both call into scraper_kit.providers.{cian,yandex}.newbuilding,
which construct BrowserFetcher(source=...) without the now-mandatory endpoint=
kwarg (issue #2322, verified still open against the actual provider source, not
just issue status) -- no caller-side fix is possible, matching Group A's (#2305)
precedent for the same bug in admin.py.

Config-gated kit function footguns found and fixed (Group B #2306 pattern):
  - avito fetch_detail's backconnect-on-403 retry silently drops when config=
    is omitted -- now passes config=RealScraperConfig() explicitly, with a
    regression test proving the gate.
  - kit AvitoScraper's constructor now requires ScraperConfig positionally --
    wired via RealScraperConfig(), which _rotate_ip() reads for
    avito_proxy_rotate_url.
  - BrowserFetcher(source=...) call sites (house_imv_backfill, avito/cian
    detail backfills) now pass the mandatory endpoint=settings.browser_http_endpoint.

New footgun discovered (NOT #2322, flagged for follow-up): kit's
build_warmed_session() builds its curl_cffi session via _build_detail_session()
with no config parameter at all, unlike fetch_detail -- migrating it would
silently drop the sticky MGTS-proxy egress on avito_detail_backfill's
warm-batch path (the prod default). Left build_warmed_session/
_AVITO_WARM_SEARCH_URL on legacy imports, documented inline.

Refs #2310

tradein-mvp/backend/app/services/house_imv_backfill.py

@@ -25,10 +25,18 @@ from collections.abc import Callable
 from dataclasses import dataclass, field
 from typing import Literal
 
+from scraper_kit.browser_fetcher import BrowserFetcher
 from sqlalchemy import text
 from sqlalchemy.orm import Session
 
 from app.core.config import settings
+
+# app.services.scrapers.avito_imv остаётся legacy — миграция валюационных
+# зависимостей (avito_imv/cian_valuation/yandex_valuation) выделена в отдельный,
+# более рискованный issue #2308 (см. epic #2277, issue #2310 Group C). Мигрируем
+# здесь только BrowserFetcher (#2310, выше) — avito_imv.evaluate_via_imv принимает
+# его исключительно как TYPE_CHECKING-аннотацию (duck-typed на fetch_json), поэтому
+# смена конкретного класса не требует правок avito_imv.py.
 from app.services.scrapers.avito_imv import (
     IMVAddressNotFoundError,
     IMVAuthError,
@@ -36,7 +44,6 @@ from app.services.scrapers.avito_imv import (
     IMVTransientError,
     evaluate_via_imv,
 )
-from app.services.scrapers.browser_fetcher import BrowserFetcher
 
 logger = logging.getLogger(__name__)
 
@@ -484,7 +491,7 @@ async def backfill_house_imv(
     # Флаг OFF → _bf=None → evaluate_via_imv делает свою curl-сессию как раньше
     # (поведение байт-в-байт идентично доспринтовому).
     if settings.avito_imv_use_browser_fetcher:
-        async with BrowserFetcher(source="avito") as _bf:
+        async with BrowserFetcher(source="avito", endpoint=settings.browser_http_endpoint) as _bf:
             await _run_loop(_bf)
     else:
         await _run_loop(None)

tradein-mvp/backend/app/tasks/avito_detail_backfill.py

@@ -23,6 +23,18 @@ from dataclasses import dataclass, field
 from urllib.parse import urlparse
 
 from curl_cffi.requests import AsyncSession
+from scraper_kit.avito_exceptions import (
+    AvitoBlockedError,
+    AvitoListingGoneError,
+    AvitoRateLimitedError,
+)
+from scraper_kit.browser_fetcher import BrowserFetcher
+from scraper_kit.providers.avito.detail import (
+    fetch_detail,
+    research_in_session,
+    save_detail_enrichment,
+)
+from scraper_kit.providers.avito.serp import AvitoScraper
 from sqlalchemy import text
 from sqlalchemy.orm import Session
 
@@ -30,20 +42,22 @@ from app.core.config import settings
 from app.core.shutdown import shutdown_requested
 from app.services import scrape_runs as runs_mod
 from app.services.scrape_pipeline import _CHROME_HEADERS, _avito_proxies
-from app.services.scrapers.avito import AvitoScraper
+from app.services.scraper_adapters import RealScraperConfig
+
+# _AVITO_WARM_SEARCH_URL/build_warmed_session остаются legacy (#2310): kit's
+# scraper_kit.providers.avito.detail.build_warmed_session() строит сессию через
+# _build_detail_session() БЕЗ config-параметра (сигнатура вообще не принимает
+# ScraperConfig — в отличие от fetch_detail, здесь нет caller-side способа
+# прокинуть прокси). Мигрировав этот импорт, warm-batch curl-путь (use_curl=True,
+# ДЕФОЛТ прод-режима, avito_detail_backfill_use_curl=True) молча перестал бы
+# использовать settings.scraper_proxy_url (sticky МГТС-прокси) — прямое
+# datacenter-подключение вместо backconnect. Тот же класс бага, что #2322
+# (недостающая инъекция конфига в scraper_kit provider-функции), но другая
+# функция — заведён как отдельный follow-up, НЕ #2322. См. отчёт issue #2310.
 from app.services.scrapers.avito_detail import (
     _AVITO_WARM_SEARCH_URL,
     build_warmed_session,
-    fetch_detail,
-    research_in_session,
-    save_detail_enrichment,
 )
-from app.services.scrapers.avito_exceptions import (
-    AvitoBlockedError,
-    AvitoListingGoneError,
-    AvitoRateLimitedError,
-)
-from app.services.scrapers.browser_fetcher import BrowserFetcher
 
 logger = logging.getLogger(__name__)
 
@@ -121,7 +135,10 @@ async def run_avito_detail_backfill(
     own_session = False
     own_browser = False
 
-    scraper = AvitoScraper()
+    # kit AvitoScraper требует ScraperConfig позиционно (Strangler-инжекция #2133) —
+    # RealScraperConfig проксирует settings.* так же, как читал legacy-конструктор без
+    # аргументов (avito_proxy_rotate_url и т.д. для _rotate_ip()).
+    scraper = AvitoScraper(RealScraperConfig())
     start = time.monotonic()
 
     logger.info(
@@ -136,7 +153,9 @@ async def run_avito_detail_backfill(
         # эфемерную _build_detail_session() через settings.scraper_proxy_url (backconnect).
         # use_curl=False (legacy): browser_mode=True → BrowserFetcher/auv, как раньше.
         if browser_mode:
-            browser_fetcher = BrowserFetcher(source="avito")
+            browser_fetcher = BrowserFetcher(
+                source="avito", endpoint=settings.browser_http_endpoint
+            )
             await browser_fetcher.__aenter__()
             own_browser = True
             scraper._browser = browser_fetcher
@@ -314,6 +333,13 @@ async def run_avito_detail_backfill(
                         browser_fetcher=browser_fetcher,
                         referer=_AVITO_WARM_SEARCH_URL if use_curl else None,
                         reconnect_on_block=not use_curl,
+                        # config= обязателен: kit fetch_detail без него читает
+                        # config.scraper_proxy_url=None для backconnect-gate'а
+                        # (elif not use_curl own-session path), теряя reconnect-
+                        # on-403 поведение legacy (settings.scraper_proxy_url
+                        # напрямую). Не влияет на use_curl=True (прод-дефолт) —
+                        # там reconnect_on_block=False уже гасит backconnect.
+                        config=RealScraperConfig(),
                     ),
                     timeout=fetch_timeout_s,
                 )

tradein-mvp/backend/app/tasks/cian_history_backfill.py

@@ -27,12 +27,17 @@ import logging
 import time
 from dataclasses import dataclass, field
 
+from scraper_kit.browser_fetcher import BrowserFetcher
+from scraper_kit.providers.cian.detail import fetch_detail, save_detail_enrichment
 from sqlalchemy import text
 from sqlalchemy.orm import Session
 
+from app.core.config import settings
 from app.services.scraper_settings import get_scraper_delay
-from app.services.scrapers.browser_fetcher import BrowserFetcher
+
-from app.services.scrapers.cian_detail import fetch_detail, save_detail_enrichment
+# cian_valuation остаётся legacy — валюационные зависимости (avito_imv/
+# cian_valuation/yandex_valuation) выделены в отдельный, более рискованный
+# issue #2308 (см. epic #2277, issue #2310 Group C), не в этой миграции.
 from app.services.scrapers.cian_valuation import estimate_via_cian_valuation
 
 logger = logging.getLogger(__name__)
@@ -113,7 +118,7 @@ async def backfill_cian_history(
         else:
             # One BrowserFetcher instance shared across all listings in this batch.
             # priceChanges requires JS rendering — curl_cffi returns empty list (#1574).
-            async with BrowserFetcher(source="cian") as bf:
+            async with BrowserFetcher(source="cian", endpoint=settings.browser_http_endpoint) as bf:
                 for row in rows:
                     listing_id: int = row["id"]
                     source_url: str = row["source_url"]
@@ -157,6 +162,11 @@ async def backfill_cian_history(
 
     # ── 2. Houses: missing houses_price_dynamics ──────────────────────────────
     if do_houses:
+        # cian_newbuilding остаётся legacy (issue #2310, NOT migrated): kit's
+        # scraper_kit.providers.cian.newbuilding.fetch_newbuilding() constructs
+        # BrowserFetcher(source="cian") WITHOUT the now-mandatory endpoint= kwarg
+        # → TypeError on every call, no caller-side fix possible (issue #2322,
+        # still open — verified against provider source, not just issue status).
         from app.services.scrapers.cian_newbuilding import (
             fetch_newbuilding,
             save_newbuilding_enrichment,

tradein-mvp/backend/app/tasks/ekb_geoportal_ingest.py

@@ -24,14 +24,14 @@ import logging
 import os
 import re
 
+from scraper_kit.providers.ekb_geoportal.client import (
+    EkbGeoportalClient,
+    TopoBuilding,
+)
 from sqlalchemy import text
 from sqlalchemy.orm import Session
 
 from app.core.db import SessionLocal
-from app.services.scrapers.ekb_geoportal_client import (
-    EkbGeoportalClient,
-    TopoBuilding,
-)
 
 logger = logging.getLogger(__name__)
 

tradein-mvp/backend/app/tasks/newbuilding_enrich_backfill.py

@@ -95,18 +95,18 @@ class NewbuildingEnrichBackfillResult:
     """Per-run counters for the newbuilding-enrichment backfill."""
 
     # Population sizing (independent of `limit`).
-    cian_houses_total: int = 0           # houses linked to ext_source='cian_newbuilding'
+    cian_houses_total: int = 0  # houses linked to ext_source='cian_newbuilding'
-    cian_houses_fetchable: int = 0       # of those, with cian_zhk_url OR resolvable ext_id
+    cian_houses_fetchable: int = 0  # of those, with cian_zhk_url OR resolvable ext_id
-    cian_houses_pending: int = 0         # fetchable AND not yet fully enriched (force=False)
+    cian_houses_pending: int = 0  # fetchable AND not yet fully enriched (force=False)
 
     # Processing (bounded by `limit`).
     processed: int = 0
     skipped_already_enriched: int = 0
     succeeded: int = 0
-    resolved_zhk_url: int = 0            # ext_id → cian_zhk_url resolved + persisted (#972)
+    resolved_zhk_url: int = 0  # ext_id → cian_zhk_url resolved + persisted (#972)
-    failed_resolve: int = 0             # had only ext_id, resolver returned None
+    failed_resolve: int = 0  # had only ext_id, resolver returned None
-    failed_fetch: int = 0                # fetch returned None / raised
+    failed_fetch: int = 0  # fetch returned None / raised
-    failed_save: int = 0                 # save raised after a good fetch
+    failed_save: int = 0  # save raised after a good fetch
 
     # Row-level deltas (how much actually landed).
     price_dynamics_rows: int = 0
@@ -355,6 +355,16 @@ async def backfill_newbuilding_enrichment(
     # Import here (not module top) so the heavy curl_cffi scraper stack is only loaded
     # when the task actually runs — mirrors cian_history_backfill's lazy import and keeps
     # unit tests able to patch fetch_newbuilding cheaply.
+    #
+    # NOT migrated to scraper_kit (issue #2310, Group C): kit's
+    # scraper_kit.providers.cian.newbuilding.fetch_newbuilding() constructs
+    # BrowserFetcher(source="cian") WITHOUT the now-mandatory endpoint= kwarg —
+    # every call raises TypeError, with no caller-side fix possible (the kit
+    # provider function doesn't expose a config/endpoint hook at all). This is
+    # issue #2322, verified STILL OPEN by reading the actual provider source
+    # (not just the issue's open/closed status) at the time of this migration.
+    # Left on legacy entirely, exactly like Group A (#2305) did for the same
+    # bug in admin.py's debug endpoints.
     from app.services.scrapers.cian_newbuilding import (
         fetch_newbuilding,
         resolve_cian_zhk_url_via_search,
@@ -371,11 +381,7 @@ async def backfill_newbuilding_enrichment(
     result.cian_houses_fetchable = sizing["fetchable"]
     result.cian_houses_pending = sizing["pending"]
 
-    rows = (
+    rows = db.execute(text(_SELECT_PENDING_HOUSES), {"force": force, "lim": limit}).mappings().all()
-        db.execute(text(_SELECT_PENDING_HOUSES), {"force": force, "lim": limit})
-        .mappings()
-        .all()
-    )
 
     logger.info(
         "newbuilding-enrich backfill: cian_houses total=%d fetchable=%d pending=%d; "
@@ -547,9 +553,7 @@ async def backfill_newbuilding_enrichment(
                     db.commit()
                 except Exception as dexc:
                     sp.rollback()
-                    logger.warning(
+                    logger.warning("reliability dedup failed house_id=%s: %s", house_id, dexc)
-                        "reliability dedup failed house_id=%s: %s", house_id, dexc
-                    )
 
             pd_after, rc_after, rv_after = _house_enrichment_counts(db, house_id)
             result.price_dynamics_rows += max(0, pd_after - pd_before)

tradein-mvp/backend/app/tasks/yandex_detail_backfill.py

@@ -31,12 +31,12 @@ import time
 from dataclasses import dataclass, field
 
 from curl_cffi.requests import AsyncSession
+from scraper_kit.providers.yandex.detail import YandexDetailScraper, save_detail_enrichment
 from sqlalchemy import text
 from sqlalchemy.orm import Session
 
 from app.core.config import settings
 from app.services import scrape_runs as runs_mod
-from app.services.scrapers.yandex_detail import YandexDetailScraper, save_detail_enrichment
 
 logger = logging.getLogger(__name__)
 

tradein-mvp/backend/app/tasks/yandex_newbuilding_sweep.py

@@ -206,6 +206,15 @@ async def enrich_yandex_newbuilding_sweep(
     Returns:
         YandexNewbuildingSweepResult со счётчиками.
     """
+    # NOT migrated to scraper_kit (issue #2310, Group C): both
+    # scraper_kit.providers.yandex.newbuilding.YandexNewbuildingScraper.fetch_jk()
+    # AND resolve_yandex_jk_slug() construct BrowserFetcher(source="yandex")
+    # WITHOUT the now-mandatory endpoint= kwarg — every call raises TypeError,
+    # with no caller-side fix possible (the kit provider functions don't expose
+    # a config/endpoint hook at all). This is issue #2322, verified STILL OPEN
+    # by reading the actual provider source (not just the issue's open/closed
+    # status) at the time of this migration. Left on legacy entirely, exactly
+    # like Group A (#2305) did for the same bug in admin.py's debug endpoints.
     from app.services.scrapers.yandex_newbuilding import (
         YandexNewbuildingScraper,
         resolve_yandex_jk_slug,

tradein-mvp/backend/tests/tasks/test_avito_detail_backfill.py

@@ -145,7 +145,7 @@ async def test_backfill_blocked_abort_after_max_consecutive() -> None:
     #1950 abort-reorder: abort-check ПЕРЕД recovery → на 5-м (аборт-)блоке rotate_ip
     НЕ дёргается (не тратим recovery на финальном блоке). rotate_ip x4 (блоки 1-4).
     """
-    from app.services.scrapers.avito_exceptions import AvitoBlockedError
+    from scraper_kit.avito_exceptions import AvitoBlockedError
 
     snapshot = _make_snapshot(10)
     db = _mock_db(snapshot)
@@ -267,7 +267,7 @@ async def test_backfill_top_level_exception_marks_failed() -> None:
 @pytest.mark.asyncio
 async def test_backfill_rotate_ip_called_on_each_block() -> None:
     """1 block + 1 success -> rotate_ip called once, enriched=1."""
-    from app.services.scrapers.avito_exceptions import AvitoBlockedError
+    from scraper_kit.avito_exceptions import AvitoBlockedError
 
     snapshot = _make_snapshot(2)
     db = _mock_db(snapshot)
@@ -379,6 +379,7 @@ async def test_backfill_fetch_timeout_skips_and_continues() -> None:
         browser_fetcher: object = None,
         referer: object = None,
         reconnect_on_block: bool = True,
+        config: object = None,
     ):
         call_urls.append(url)
         if len(call_urls) == 1:
@@ -423,7 +424,7 @@ async def test_backfill_listing_gone_marks_inactive_no_breaker() -> None:
     состоит из dead-листингов; раньше 404 ловился как soft-block → breaker абортил run
     до live-листингов. Теперь 404 нейтрален к breaker'у и метит листинг inactive.
     """
-    from app.services.scrapers.avito_exceptions import AvitoListingGoneError
+    from scraper_kit.avito_exceptions import AvitoListingGoneError
 
     snapshot = _make_snapshot(1)
     db = _mock_db(snapshot)
@@ -541,8 +542,11 @@ async def test_backfill_use_curl_false_creates_browser_fetcher() -> None:
             db, run_id=10, params={"batch_size": 10, "budget_sec": 3600}
         )
 
-    # BrowserFetcher должен быть создан (source="avito")
+    # BrowserFetcher должен быть создан (source="avito", endpoint из settings — #2310
-    mock_bf_cls.assert_called_once_with(source="avito")
+    # kit BrowserFetcher требует endpoint= обязательным keyword-only параметром)
+    mock_bf_cls.assert_called_once_with(
+        source="avito", endpoint=fake_settings.browser_http_endpoint
+    )
     # fetch_detail вызван с browser_fetcher установленным (не None)
     assert mock_fetch.call_count == 1
     _, kwargs = mock_fetch.call_args
@@ -560,7 +564,7 @@ async def test_backfill_use_curl_block_cooldown_research_no_rebuild() -> None:
     нельзя. Блок = rate-limit текущего IP → cooldown + re-search той же сессией.
     fetch: 1-й вызов BLOCKED, 2-й — успех.
     """
-    from app.services.scrapers.avito_exceptions import AvitoBlockedError
+    from scraper_kit.avito_exceptions import AvitoBlockedError
 
     snapshot = _make_snapshot(2)
     db = _mock_db(snapshot)

tradein-mvp/backend/tests/test_scraper_kit_group_c_backfill_kit_parity.py

@@ -0,0 +1,297 @@
+"""Parity tests for issue #2310 (Group C of scraper_kit migration epic #2277).
+
+Migrates legacy scraper imports of these files to their `scraper_kit` equivalents
+(behavior of the enclosing task/service functions is unchanged — see vault audit
+`Scraper_Kit_Legacy_Dependency_Audit_0703`):
+
+  - app/services/house_imv_backfill.py    → BrowserFetcher now from
+    `scraper_kit.browser_fetcher` (was `app.services.scrapers.browser_fetcher`).
+    avito_imv itself stays legacy (valuation dependency, issue #2308 — separate).
+  - app/tasks/avito_detail_backfill.py    → AvitoScraper/BrowserFetcher/avito
+    exceptions/fetch_detail/research_in_session/save_detail_enrichment now from
+    `scraper_kit.*`. `build_warmed_session`/`_AVITO_WARM_SEARCH_URL` stay legacy —
+    kit's `build_warmed_session()` builds its curl_cffi session via
+    `_build_detail_session()` with NO config parameter at all (unlike
+    `fetch_detail`, which does), so there is no caller-side way to inject
+    `settings.scraper_proxy_url` — migrating it would silently drop the sticky
+    MGTS-proxy egress on the warm-batch path (avito_detail_backfill_use_curl=True,
+    the PROD DEFAULT). Same bug category as issue #2322 (scraper_kit provider
+    missing a config hook), different function — flagged as a new follow-up.
+  - app/tasks/cian_history_backfill.py    → fetch_detail/save_detail_enrichment
+    (listings block) + BrowserFetcher now from `scraper_kit.*`. The houses block
+    (cian_newbuilding.fetch_newbuilding/save_newbuilding_enrichment) and the
+    valuations block (cian_valuation.estimate_via_cian_valuation) stay legacy —
+    issue #2322 (newbuilding BrowserFetcher missing endpoint=) resp. issue #2308
+    (valuation dependencies), both out of scope here.
+  - app/tasks/ekb_geoportal_ingest.py     → EkbGeoportalClient/TopoBuilding now
+    from `scraper_kit.providers.ekb_geoportal.client` (already proven byte-
+    identical by tests/scrapers/test_ekb_geoportal_client_kit_parity.py, #2307).
+
+This file proves the DELTA introduced by the #2310 migration specifically —
+general avito/cian-provider parsing golden-parity is already covered by
+`tests/test_scraper_kit_avito_golden_parity.py` and
+`tests/test_scraper_kit_cian_golden_parity.py`. Uses `tests/support/parity.assert_parity`
+per the epic's parity-gate convention (issue #2304).
+"""
+
+from __future__ import annotations
+
+import asyncio
+import dataclasses
+import json
+import os
+from typing import Any
+from unittest.mock import AsyncMock, MagicMock, patch
+
+# Legacy app.services.scrapers.* / app.core.config.settings require DATABASE_URL at
+# import time (same pattern as tests/scrapers/test_avito_detail_kit_parity.py).
+os.environ.setdefault("DATABASE_URL", "postgresql+psycopg://test:test@localhost/test_db")
+
+from scraper_kit.avito_exceptions import AvitoBlockedError as KitAvitoBlockedError
+from scraper_kit.providers.avito.detail import fetch_detail as kit_avito_fetch_detail
+from scraper_kit.providers.avito.serp import AvitoScraper as KitAvitoScraper
+from scraper_kit.providers.cian.detail import fetch_detail as kit_cian_fetch_detail
+
+from app.core.config import settings
+from app.services.scraper_adapters import RealScraperConfig
+from app.services.scrapers.avito_detail import fetch_detail as legacy_avito_fetch_detail
+from app.services.scrapers.cian_detail import fetch_detail as legacy_cian_fetch_detail
+from tests.support.parity import assert_parity
+
+# ── avito fetch_detail: backconnect config-gate (avito_detail_backfill.py delta) ──
+
+
+def _mock_session_403_then_ok(html: str) -> MagicMock:
+    """curl_cffi-like session: first .get() -> 403, second -> 200 with html."""
+    resp_403 = MagicMock(status_code=403, text="")
+    resp_ok = MagicMock(status_code=200, text=html)
+    session = MagicMock()
+    session.get = AsyncMock(side_effect=[resp_403, resp_ok])
+    session.close = AsyncMock()
+    return session
+
+
+def _detail_html() -> str:
+    return (
+        '<html><body><div data-marker="item-view/item-id">'
+        "№ 1 · 1 мая в 10:00 · 1 просмотр</div>"
+        '<span itemprop="price" content="1000000">1 000 000 ₽</span>'
+        "</body></html>"
+    )
+
+
+async def test_avito_fetch_detail_without_config_raises_on_403_no_reconnect() -> None:
+    """kit fetch_detail with config=None never retries on 403 — proves the config-gate
+    is real: avito_detail_backfill's own-session call site MUST pass config= or it loses
+    the backconnect-reconnect-on-block behavior that legacy always had via settings.*."""
+    session = _mock_session_403_then_ok(_detail_html())
+    with patch("scraper_kit.providers.avito.detail.asyncio.sleep", new_callable=AsyncMock):
+        try:
+            await kit_avito_fetch_detail(
+                "https://www.avito.ru/x", cffi_session=session, reconnect_on_block=True
+            )
+        except KitAvitoBlockedError:
+            pass
+        else:
+            raise AssertionError("expected AvitoBlockedError when config= is omitted")
+    # Only ONE .get() happened — no reconnect retry attempted (backconnect gate closed).
+    assert session.get.call_count == 1
+
+
+async def test_avito_fetch_detail_with_config_reconnects_on_403_like_legacy() -> None:
+    """With config=RealScraperConfig() (our actual avito_detail_backfill call site) and
+    a configured proxy, a 403 triggers a fresh-session reconnect retry — matching legacy,
+    which always read settings.scraper_proxy_url directly (no injection needed)."""
+    session = _mock_session_403_then_ok(_detail_html())
+    retry_session = MagicMock()
+    retry_session.get = AsyncMock(return_value=MagicMock(status_code=200, text=_detail_html()))
+    retry_session.close = AsyncMock()
+
+    with (
+        patch.object(settings, "scraper_proxy_url_env", "http://test-proxy.local:8080"),
+        patch("scraper_kit.providers.avito.detail.asyncio.sleep", new_callable=AsyncMock),
+        patch(
+            "scraper_kit.providers.avito.detail._build_detail_session",
+            return_value=retry_session,
+        ),
+    ):
+        result = await kit_avito_fetch_detail(
+            "https://www.avito.ru/x",
+            cffi_session=session,
+            reconnect_on_block=True,
+            config=RealScraperConfig(),
+        )
+
+    assert result is not None
+    # First (caller-provided) session saw the 403; retry_session served the 200 that
+    # produced the parsed result.
+    assert session.get.call_count == 1
+    retry_session.get.assert_awaited_once()
+
+
+# ── AvitoScraper: kit constructor now requires ScraperConfig (positional) ────────
+
+
+def test_avito_scraper_rotate_ip_reads_injected_config() -> None:
+    """kit AvitoScraper(config) is a required positional arg (legacy AvitoScraper()
+    took none, reading settings.avito_proxy_rotate_url directly at call time inside
+    _rotate_ip). avito_detail_backfill.py now constructs AvitoScraper(RealScraperConfig())
+    — this proves the injected config is what _rotate_ip actually reads."""
+    scraper = KitAvitoScraper(RealScraperConfig())
+    assert scraper._config.avito_proxy_rotate_url == settings.avito_proxy_rotate_url
+
+
+# ── cian fetch_detail via browser_fetcher (cian_history_backfill.py call shape) ──
+
+
+def _cian_detail_html() -> str:
+    default_state = {
+        "offerData": {
+            "offer": {
+                "cianId": 777,
+                "priceChanges": [
+                    {"changeTime": "2026-06-01T00:00:00Z", "price": 5900000, "diffPercent": -0.5}
+                ],
+            },
+            "stats": {},
+        }
+    }
+    ds_json = json.dumps(default_state, ensure_ascii=False)
+    return (
+        "<html><body><script>\n"
+        "window._cianConfig['frontend-offer-card'] = "
+        "window._cianConfig['frontend-offer-card'] || [];\n"
+        "window._cianConfig['frontend-offer-card'].push({"
+        f"key: 'defaultState', value: {ds_json}, priority: 10, filter: null"
+        "});\n</script></body></html>"
+    )
+
+
+def _fake_browser_fetcher(html: str) -> Any:
+    bf = MagicMock()
+    bf.fetch = AsyncMock(return_value=html)
+    return bf
+
+
+def test_cian_fetch_detail_via_browser_fetcher_parity() -> None:
+    """cian_history_backfill.py's listings block ALWAYS calls fetch_detail(url,
+    browser_fetcher=bf) — never the curl_cffi/config own-session path exercised by
+    tests/test_scraper_kit_pricehistory_session_parity.py (cian_price_history.py's
+    call shape). Proves parity holds for THIS call shape too."""
+    html = _cian_detail_html()
+    url = "https://ekb.cian.ru/sale/flat/777/"
+
+    def _run_legacy() -> Any:
+        return dataclasses.asdict(
+            asyncio.run(legacy_cian_fetch_detail(url, browser_fetcher=_fake_browser_fetcher(html)))
+        )
+
+    def _run_kit() -> Any:
+        return dataclasses.asdict(
+            asyncio.run(kit_cian_fetch_detail(url, browser_fetcher=_fake_browser_fetcher(html)))
+        )
+
+    assert_parity(legacy_fn=_run_legacy, kit_fn=_run_kit, fixtures=[()])
+
+
+# ── avito fetch_detail via browser_fetcher (avito_detail_backfill.py browser_mode) ──
+
+
+def test_avito_fetch_detail_via_browser_fetcher_parity() -> None:
+    """browser_mode branch of avito_detail_backfill.py calls fetch_detail(url,
+    browser_fetcher=browser_fetcher) — config is never read on this path (early
+    return before the config-gated backconnect logic). Confirms legacy/kit agree."""
+    html = _detail_html()
+    url = "https://www.avito.ru/ekaterinburg/kvartiry/test_1"
+
+    def _run_legacy() -> Any:
+        return dataclasses.asdict(
+            asyncio.run(legacy_avito_fetch_detail(url, browser_fetcher=_fake_browser_fetcher(html)))
+        )
+
+    def _run_kit() -> Any:
+        return dataclasses.asdict(
+            asyncio.run(kit_avito_fetch_detail(url, browser_fetcher=_fake_browser_fetcher(html)))
+        )
+
+    assert_parity(legacy_fn=_run_legacy, kit_fn=_run_kit, fixtures=[()])
+
+
+# ── BrowserFetcher(endpoint=) wiring — house_imv_backfill.py / cian_history_backfill.py ──
+
+
+async def test_house_imv_backfill_browser_fetcher_uses_settings_endpoint() -> None:
+    """house_imv_backfill.py's BrowserFetcher(source="avito") now needs endpoint=
+    (kit's mandatory keyword-only param) — proves the call site passes
+    settings.browser_http_endpoint, matching legacy's internal settings read."""
+    from app.services import house_imv_backfill
+
+    captured: dict[str, Any] = {}
+
+    class _FakeBrowserFetcher:
+        def __init__(self, **kwargs: Any) -> None:
+            captured.update(kwargs)
+
+        async def __aenter__(self) -> _FakeBrowserFetcher:
+            return self
+
+        async def __aexit__(self, *_: object) -> None:
+            return None
+
+    with (
+        patch.object(house_imv_backfill.settings, "avito_imv_use_browser_fetcher", True),
+        patch.object(house_imv_backfill, "BrowserFetcher", _FakeBrowserFetcher),
+        patch.object(house_imv_backfill, "_process_one_house", AsyncMock(return_value="ok")),
+    ):
+        db = MagicMock()
+        db.execute.return_value.mappings.return_value.all.return_value = [
+            {"id": 1, "address": "ЕКБ, ул. X, 1", "full_address": None, "lat": 56.8, "lon": 60.6}
+        ]
+        await house_imv_backfill.backfill_house_imv(db, batch_size=1)
+
+    assert captured == {"source": "avito", "endpoint": settings.browser_http_endpoint}
+
+
+async def test_cian_history_backfill_browser_fetcher_uses_settings_endpoint() -> None:
+    """cian_history_backfill.py's BrowserFetcher(source="cian") also needs endpoint=."""
+    from app.tasks import cian_history_backfill
+
+    captured: dict[str, Any] = {}
+
+    class _FakeBrowserFetcher:
+        def __init__(self, **kwargs: Any) -> None:
+            captured.update(kwargs)
+
+        async def __aenter__(self) -> _FakeBrowserFetcher:
+            return self
+
+        async def __aexit__(self, *_: object) -> None:
+            return None
+
+    db = MagicMock()
+    db.execute.return_value.mappings.return_value.all.return_value = []
+
+    with patch.object(cian_history_backfill, "BrowserFetcher", _FakeBrowserFetcher):
+        await cian_history_backfill.backfill_cian_history(
+            db, do_listings=True, do_houses=False, do_valuations=False
+        )
+
+    assert captured == {"source": "cian", "endpoint": settings.browser_http_endpoint}
+
+
+# ── ekb_geoportal_ingest.py: task module resolves the kit client import ──────────
+
+
+def test_ekb_geoportal_ingest_imports_kit_client() -> None:
+    """app/tasks/ekb_geoportal_ingest.py now imports EkbGeoportalClient/TopoBuilding
+    from scraper_kit.providers.ekb_geoportal.client (issue #2310) — proves the task
+    module resolves to the SAME classes as the kit package (not a stale/duplicate
+    import), and that construction still works with no arguments."""
+    from scraper_kit.providers.ekb_geoportal.client import (
+        EkbGeoportalClient as KitClient,
+    )
+
+    from app.tasks.ekb_geoportal_ingest import EkbGeoportalClient as TaskClient
+
+    assert TaskClient is KitClient
+    assert isinstance(TaskClient(), KitClient)