Run the three-step workflow to add SubdivisionName to the local DB and gate the Briarbrook community page.
Confirms SubdivisionName is on the OGAR feed
Backfills subdivision on all 2,180 rows (~2–3 min)
Coverage % + top 20 subdivisions
Count + sample rows for the community page gate
Check any subdivision after resync:
GET /api/spark/subdivision-proof?subdivision=YOUR_NAME&city=Carl+Junction