- Replace pytest.skip stubs with actual DB tests against central_test
- Test backfill for all three adapters (nws, firms, usgs_quake)
- Test FK RESTRICT, NOT NULL, and FK validation constraints
- Test schema changes (source dropped, adapter exists with constraints)
- Delete stale sql/schema.sql (migrations are sole source of truth)
- Update docs/migrations.md with schema.sql removal note
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>