feat(tradein): СберИндекс monthly city-level price index pull (#887)
Data-layer impl of #887 (steps 1-3+5; client-visible estimator time-adjust
step 4 deferred to backtest-gated follow-up — estimator.py untouched).
- migration 092: sber_price_index table (additive, CREATE TABLE IF NOT EXISTS)
- migration 093: scrape_schedules seed (source=sber_index_pull, ON CONFLICT DO NOTHING)
- sber_index.py: base64 /api/sowa route builder + decoder + async fetch +
idempotent upsert ON CONFLICT (city,period_month,dashboard)
- task wrapper + scheduler trigger + dispatch branch (monthly); 3 dashboards
(deals/hedonic/asking) REALTY=2; per-series graceful errors; asking benchmark log
NOTE: REF_AREA codes EKB/MSK unresolved (sberindex TLS unreachable from CI;
643=РФ only) — TODO in SBER_REF_AREAS. 20 tests pass.
Refs #887, #794, #652
bot-backend
19085547bc