CRITICAL #1: houses INSERT now populates source, ext_house_id, url (NOT NULL cols) with
ON CONFLICT (source, ext_house_id) upsert; source_url param added with synthetic fallback.
CRITICAL #2: geom removed from INSERT col list — houses_set_geom_trg trigger auto-populates.
CRITICAL #3: Tier 3 ST_DWithin/ST_Distance now cast geom::geography on both sides to avoid
mixed geometry/geography function lookup failure.
CRITICAL #4: normalize.py _PUNCT now keeps hyphens ([^\w\s\-]); abbreviation expansion for
пр-кт/б-р/пр-д runs before hyphen collapse, eliminating leftover кт token.
HIGH #5: Tier 0 cadastral queries add ORDER BY id ASC for deterministic results (houses + listings).
HIGH #6: match_or_create_house docstring documents race-condition known limitation + Stage 8.x plan.
Medium #7: no-op ('литер', 'литер') entry removed from _ABBREV.
Medium #9: update_canonical_fields raises NotImplementedError instead of silent pass.
Medium #11: price_rub bigint truncation comment added to _upsert_listing_source.
Medium #14: upsert_listing_source exported from __init__.py __all__.
Tests: 29/29 pass; prkT test asserts no leftover кт; update_canonical_fields test updated.
