Multi-Source Integration Phase 1.3. Manual operator scripts for legacy data
migration. NOT auto-applied -- run explicitly via uv/psql.
scripts/:
- backfill_001_address_fingerprints.py -- Python, populates houses.address_fingerprint
for rows where NULL (uses matching/normalize.address_fingerprint from PR #470)
- backfill_002_house_sources.sql -- INSERT INTO house_sources FROM houses,
ON CONFLICT (ext_source, ext_id) DO NOTHING (idempotent)
- backfill_003_listing_sources.sql -- INSERT INTO listing_sources FROM listings,
same pattern
- README.md -- order + usage
All idempotent -- re-running safe. confidence=1.0, matched_method='backfill'.
