Generate reusable countywide Esri aerial packages by FIPS. Jobs are stored in Supabase and can be resumed by the cloud worker without starting over.

Built-in Vercel cron processes queued jobs one resumable chunk at a time. Optional higher-throughput worker for Railway/Fly/VPS can take a lease; browser/Vercel runners will yield while that lease is active:
node scripts/offline-tiler-worker.js --poll --batch-tile-limit 500 --throttle-ms 125