perf(tradein): index hygiene — drop dup/redundant + de-partial is_active (#730)
Deterministic subset of TradeinDb_Audit_May30. Migration 097 (BEGIN/COMMIT,
IF EXISTS, idempotent):
- drop 4 exact-duplicate indexes (houses_kadastr_idx2, houses_addr_fp_idx,
listings_scraped_idx, listing_sources_price_divergence_idx) + redundant
houses_source_ext_idx (covered by UNIQUE constraint backing index)
- de-partial 5 listings WHERE is_active=true indexes (is_active 100% true →
full index strictly covers partial, no plan regression)
87-unused sweep DEFERRED — needs a live pg_stat_user_indexes snapshot.
Refs #730
bot-backend
dce3251713