- _save_yandex_history_items now resolves house_id ONCE per page using
match_or_create_house (3-tier: cadastral, fingerprint, geo-proximity, new)
- Persists house_id, source_confidence, removed_date, total_floors, notes
- Graceful fallback to house_id=NULL when match fails
- 160 orphan rows on prod will get linked on next run
Builds on PR #526 (parser fixes: removed_date, total_floors, NBSP).