feat(tradein/lead): persist 152-ФЗ proof-of-consent (client_ip, policy version, text snapshot)

Migration 182 adds nullable client_ip/consent_policy_version/consent_text_snapshot
to trade_in_leads; create_trade_in_lead now writes them (previously audit-log only,
#2497 TODO). Migrate-before-app (#2216 precedent). LOW audit R2 (#9).

tradein-mvp/backend/app/api/v1/lead.py

@@ -35,12 +35,21 @@ _PHONE_PATTERN = r"^[+]?[\d\s().-]{5,32}$"
 _PHONE_MIN_DIGITS = 10
 _PHONE_MAX_DIGITS = 15
 
-# Версия политики обработки ПДн (152-ФЗ), под которую собрано согласие. Пока пишется
-# только в audit-лог: в trade_in_leads НЕТ колонок под policy_version / client_ip /
-# снимок текста согласия (проверено live: \d trade_in_leads, 2026-07-12). Полноценный
-# proof-of-consent требует follow-up миграции — см. TODO у INSERT ниже.
+# Версия политики обработки ПДн (152-ФЗ), под которую собрано согласие. Персистится
+# per-row в trade_in_leads.consent_policy_version (migration 182) — до неё писалась
+# только в audit-лог (#2497 TODO, теперь закрыт).
 _CONSENT_POLICY_VERSION = "2026-07"
 
+# Снимок точного текста согласия, который видит пользователь при отправке лида.
+# Должен ДОСЛОВНО совпадать с чекбоксом в LeadForm.tsx (frontend/src/components/
+# trade-in/v2/LeadForm.tsx) — если текст политики меняется, здесь нужно поднять
+# _CONSENT_POLICY_VERSION И обновить этот снимок в одном PR, иначе новые строки
+# будут нести устаревший snapshot под новой version-меткой.
+_CONSENT_TEXT_SNAPSHOT = (
+    "Согласен(-на) на обработку персональных данных в соответствии с "
+    "Федеральным законом «О персональных данных» № 152-ФЗ"
+)
+
 
 class TradeInLeadInput(BaseModel):
     phone: str = Field(min_length=5, max_length=32, pattern=_PHONE_PATTERN)
@@ -78,26 +87,30 @@ async def create_trade_in_lead(
 
     user_agent = request.headers.get("user-agent")
     # 152-ФЗ audit trail: реальный клиентский IP из X-Forwarded-For (его ставит
-    # фронтящий Caddy), fallback — прямой peer. Пишем только в лог: durable-колонки
-    # под IP в trade_in_leads нет (см. TODO у INSERT).
+    # фронтящий Caddy), fallback — прямой peer. Персистится per-row в
+    # trade_in_leads.client_ip (migration 182), а не только в лог.
     client_ip = request.headers.get("x-forwarded-for")
     if client_ip:
         client_ip = client_ip.split(",")[0].strip()
     elif request.client is not None:
         client_ip = request.client.host
 
-    # TODO(152-ФЗ proof-of-consent): trade_in_leads хранит согласие как голый boolean
-    # + created_at + user_agent. Для полноценного доказательства согласия нужна
-    # follow-up миграция с колонками client_ip (inet), consent_policy_version (text),
-    # consent_text_snapshot (text) — тогда client_ip/_CONSENT_POLICY_VERSION пойдут в
-    # строку, а не только в лог. Live-схема на 2026-07-12 таких колонок НЕ имеет
-    # (out of scope этого PR).
+    # 152-ФЗ proof-of-consent: client_ip / consent_policy_version /
+    # consent_text_snapshot теперь durable-колонки на trade_in_leads (migration 182,
+    # ранее — только audit-лог, #2497 TODO). client_ip может быть None (нет
+    # X-Forwarded-For и request.client) — колонка nullable, CAST(NULL AS inet) валиден.
     row = (
         db.execute(
             text(
                 """
-            INSERT INTO trade_in_leads (estimate_id, phone, consent, source, user_agent)
-            VALUES (CAST(:estimate_id AS uuid), :phone, :consent, :source, :user_agent)
+            INSERT INTO trade_in_leads (
+                estimate_id, phone, consent, source, user_agent,
+                client_ip, consent_policy_version, consent_text_snapshot
+            )
+            VALUES (
+                CAST(:estimate_id AS uuid), :phone, :consent, :source, :user_agent,
+                CAST(:client_ip AS inet), :consent_policy_version, :consent_text_snapshot
+            )
             RETURNING CAST(id AS text), created_at
             """
             ),
@@ -107,6 +120,9 @@ async def create_trade_in_lead(
                 "consent": payload.consent,
                 "source": payload.source,
                 "user_agent": user_agent,
+                "client_ip": client_ip,
+                "consent_policy_version": _CONSENT_POLICY_VERSION,
+                "consent_text_snapshot": _CONSENT_TEXT_SNAPSHOT,
             },
         )
         .mappings()

tradein-mvp/backend/data/sql/182_trade_in_leads_consent_proof.sql

@@ -0,0 +1,43 @@
+-- 182_trade_in_leads_consent_proof.sql
+-- LOW audit R2 (#9): durable 152-ФЗ proof-of-consent for trade_in_leads.
+--
+-- WHY:
+--   #2497 already computes client_ip (X-Forwarded-For, fallback direct peer)
+--   and pins _CONSENT_POLICY_VERSION = "2026-07" in app/api/v1/lead.py, but
+--   both were written ONLY to the audit log — trade_in_leads had no columns
+--   to hold them (explicit TODO at the INSERT in lead.py). A bare boolean
+--   `consent` column plus a log line is not durable proof: logs rotate/expire,
+--   the row itself carries no evidence of what was agreed to, under what
+--   policy version, or from what IP.
+--
+-- WHAT:
+--   Three nullable columns on trade_in_leads:
+--     - client_ip (inet)              — same value already computed in
+--                                        create_trade_in_lead, now persisted
+--                                        per-row instead of log-only.
+--     - consent_policy_version (text) — snapshot of _CONSENT_POLICY_VERSION
+--                                        at the time this lead was captured.
+--     - consent_text_snapshot (text)  — snapshot of the exact consent sentence
+--                                        shown to the user (_CONSENT_TEXT_SNAPSHOT
+--                                        in lead.py, same PR).
+--
+-- IDEMPOTENCY / SAFETY:
+--   ADD COLUMN IF NOT EXISTS x3 — safe re-run. All nullable, no DEFAULT, no
+--   backfill: existing rows keep NULL (no consent proof was captured for them
+--   pre-migration — that's an honest reflection of what actually happened,
+--   not a schema gap). Purely additive: no existing reads/writes break.
+--
+-- Dependencies: 172_trade_in_leads.sql (trade_in_leads table).
+
+BEGIN;
+
+ALTER TABLE trade_in_leads
+    ADD COLUMN IF NOT EXISTS client_ip inet,
+    ADD COLUMN IF NOT EXISTS consent_policy_version text,
+    ADD COLUMN IF NOT EXISTS consent_text_snapshot text;
+
+COMMENT ON COLUMN trade_in_leads.client_ip IS '152-ФЗ proof-of-consent: клиентский IP на момент согласия (ранее только в audit-логе, #2497 TODO).';
+COMMENT ON COLUMN trade_in_leads.consent_policy_version IS '152-ФЗ proof-of-consent: снимок _CONSENT_POLICY_VERSION на момент согласия.';
+COMMENT ON COLUMN trade_in_leads.consent_text_snapshot IS '152-ФЗ proof-of-consent: снимок текста согласия, показанного пользователю (_CONSENT_TEXT_SNAPSHOT).';
+
+COMMIT;

tradein-mvp/backend/tests/test_trade_in_lead.py

@@ -55,12 +55,15 @@ def _insert_result(lead_id: str) -> MagicMock:
 
 
 def test_lead_happy_path(client: TestClient, db: MagicMock) -> None:
+    from app.api.v1 import lead as lead_module
+
     lead_id = str(uuid4())
     db.execute.return_value = _insert_result(lead_id)
 
     r = client.post(
         "/api/v1/trade-in/lead",
         json={"phone": "+7 (912) 345-67-89", "consent": True},
+        headers={"x-forwarded-for": "203.0.113.7, 10.0.0.1"},
     )
     assert r.status_code == 200, r.text
     body = r.json()
@@ -73,6 +76,27 @@ def test_lead_happy_path(client: TestClient, db: MagicMock) -> None:
     assert params["consent"] is True
     assert params["source"] == "result"
     assert params["estimate_id"] is None
+    # 152-ФЗ proof-of-consent (migration 182): client_ip / policy version / text
+    # snapshot must reach the INSERT params, not just the audit log (#2497 TODO).
+    assert params["client_ip"] == "203.0.113.7"  # first hop of X-Forwarded-For
+    assert params["consent_policy_version"] == lead_module._CONSENT_POLICY_VERSION
+    assert params["consent_text_snapshot"] == lead_module._CONSENT_TEXT_SNAPSHOT
+
+
+def test_lead_client_ip_falls_back_to_peer_when_no_xff(client: TestClient, db: MagicMock) -> None:
+    # No X-Forwarded-For header -> falls back to request.client.host (TestClient
+    # reports "testclient"), still persisted rather than silently None.
+    lead_id = str(uuid4())
+    db.execute.return_value = _insert_result(lead_id)
+
+    r = client.post(
+        "/api/v1/trade-in/lead",
+        json={"phone": "+79123456789", "consent": True},
+    )
+    assert r.status_code == 200, r.text
+
+    params = db.execute.call_args.args[1]
+    assert params["client_ip"] == "testclient"
 
 
 def test_lead_consent_false_422(client: TestClient, db: MagicMock) -> None: