feat(sync): auto-trigger PMTiles rebuild after sync + fix progress display

- Add pmtiles-webhook.ts shared helper for triggering PMTiles rebuild
- sync-county: trigger rebuild when new features synced, pass jobId to
  syncLayer for sub-progress, update % after UAT completion (not before)
- sync-all-counties: same progress fix + rebuild trigger at end
- geoportal monitor: use shared helper instead of raw fetch
- weekend-deep-sync + auto-refresh: consolidate webhook code via helper
- docker-compose: default N8N_WEBHOOK_URL to pmtiles-webhook on satra:9876

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -72,8 +72,8 @@ services:
       - NOTIFICATION_CRON_SECRET=1547a198feca43af6c05622588c6d3b820bad5163b8c20175b2b5bbf8fc1a987
       # Weekend Deep Sync email reports (comma-separated for multiple recipients)
       - WEEKEND_SYNC_EMAIL=${WEEKEND_SYNC_EMAIL:-}
-      # N8N webhook — triggers PMTiles rebuild after sync cycle
-      - N8N_WEBHOOK_URL=${N8N_WEBHOOK_URL:-}
+      # PMTiles rebuild webhook (pmtiles-webhook systemd service on host)
+      - N8N_WEBHOOK_URL=${N8N_WEBHOOK_URL:-http://10.10.10.166:9876}
       # Portal-only users (comma-separated, redirected to /portal)
       - PORTAL_ONLY_USERS=dtiurbe,d.tiurbe
       # Address Book API (inter-service auth for external tools)