- _extract_short_addr handles Свердловская область / Россия / г. prefixes,
drops trailing кв./корп./оф., anchors on street keywords (ул./пр./пер./…)
- Tier S ORDER BY scraped_at DESC (was constant relevance_score=0.0)
- Drop ext_house_id kwarg (column never existed on listings table)
- 7 unit tests for _extract_short_addr covering real address formats
Closes 4 deferred items from gendesign-review-bot fa43ea8 review.
