Stage 3 of AvitoScraper_v2.
- _get_or_fetch_imv_cached(db, **params) — TTL 24h по cache_key (sha256 of address+params)
* Cache HIT: SELECT avito_imv_evaluations WHERE cache_key AND fetched_at > NOW() - 24h
* Cache MISS: evaluate_via_imv + save_imv_evaluation (2 HTTP requests to Avito)
* Graceful: на любой error → return None, estimator продолжает без IMV
- В estimate_quality после aggregation:
* Map house_type/repair_state → Avito IMV формат (_IMV_HOUSE_TYPE_MAP, _IMV_REPAIR_MAP)
* Skip IMV если payload без required fields (rooms/area/floor/total_floors/house_type/repair)
* Append 'avito_imv' в sources_used (saved + returned)
- После INSERT estimate: link estimate_id в avito_imv_evaluations row (для analytics joining)
- Logging: imv=<price> в final estimate log line
- pytest offline (4 tests): house_type_map / repair_map / cache_miss_fetch / fetch_failure_graceful
* anyio.run() вместо pytest-asyncio (не установлен в tradein-mvp venv)
* DATABASE_URL dummy через os.environ.setdefault (Settings fail-fast без него)
IMV — ON-DEMAND only (per estimator call), НЕ в cron-scrape.
Refs: AvitoScraper_v2_Implementation_Plan Stage 3.
