avito_detail_backfill (mode=browser) aborted prod run 458 with
attempted=5 enriched=0 blocked=5: the lat-null pending queue is dominated
by DEAD listings (404 — that's why they are stale coord-holes). In browser
mode a dead listing's 404 page ("Ошибка 404. Страница не найдена") has no
item-view, so _is_detail_soft_block returned True → AvitoBlockedError →
backfill counted it as `blocked` and the consecutive-block breaker aborted
the run before reaching live listings.
- New AvitoListingGoneError (subclass of common AvitoError, NOT of
AvitoBlockedError/AvitoRateLimitedError) so the backfill block-trap
does not catch it.
- New _is_detail_not_found() detector + browser-mode branch in fetch_detail,
checked BEFORE firewall/soft-block (keyed on the 404 title so it does not
swallow the generic soft-block deflect). Curl path unchanged (404 → 302/
non-200 → ValueError → failed, as before).
- Backfill: new `gone` counter; dedicated except AvitoListingGoneError branch
that is neutral to the consecutive-block breaker and marks the listing
is_active=FALSE (SAVEPOINT) so it leaves the snapshot scope.
Tests: unit for _is_detail_not_found (404 True; soft-block/item-view/empty
False), browser-mode fetch_detail raising AvitoListingGoneError (not Blocked),
and backfill gone-row marks inactive without aborting the breaker.
Soft-block (HTTP 200 generic витрина без item-view) теперь детектится как блок → существующая 403/firewall reconnect-машинерия → ротация exit-IP вместо silent failed (blocked=0, enriched→0 каскад). + snapshot ORDER BY (lat IS NULL) DESC для приоритизации coord-holes (#1967, in-scope 321). Tests: test_avito_detail_soft_block.py. Full tradein suite 2591 passed.
- New task app/tasks/avito_detail_backfill.py with run_avito_detail_backfill()
* Single snapshot SELECT at start (guarantees termination)
* Same proxy/AsyncSession path as scrape_pipeline.py step 5
* Budget guard (budget_sec), consecutive block abort (mark_done not mark_failed)
* rotate_ip() on every AvitoBlockedError; rollback on generic Exception (#1368)
* start = time.monotonic() initialized before try so except can reference it
- Scheduler wiring: trigger_avito_detail_backfill_run() + elif in scheduler_loop()
- Migration 112: scrape_schedules INSERT window 09-12 UTC, batch_size=800,
budget_sec=3600, request_delay_sec=6, max_consecutive_blocks=5
- 7 unit tests (no pytest-mock, unittest.mock only): all 7 passing,
full CI suite 1809 passed
