feat(parcel-sync): sync-first architecture — DB as ground truth

- Rewrite export-bundle to sync-first: check freshness -> sync layers -> enrich (magic) -> build GPKG/CSV from local DB
- Rewrite export-layer-gpkg to sync-first: sync if stale -> export from DB
- Create enrich-service.ts: extracted magic enrichment logic (CF, owners, addresses) with DB storage
- Add enrichment + enrichedAt columns to GisFeature schema
- Update PostGIS views to include enrichment data
- UI: update button labels for sync-first semantics, refresh sync status after exports
- Smart caching: skip sync if data is fresh (168h / 1 week default)

prisma/postgis-setup.sql

@@ -78,6 +78,8 @@ SELECT
   "areaValue"    AS area_value,
   "isActive"     AS is_active,
   attributes,
+  enrichment,
+  "enrichedAt"   AS enriched_at,
   "projectId"    AS project_id,
   "createdAt"    AS created_at,
   "updatedAt"    AS updated_at,

prisma/schema.prisma

@@ -34,6 +34,8 @@ model GisFeature {
   geometry     Json?                           // GeoJSON geometry (Polygon/MultiPolygon)
   // NOTE: native PostGIS column 'geom' is managed via SQL trigger (see prisma/postgis-setup.sql)
   //       Prisma doesn't need to know about it — trigger auto-populates from geometry JSON
+  enrichment   Json?                           // magic data: CF, owners, address, categories, etc.
+  enrichedAt   DateTime?                       // when enrichment was last fetched
   syncRunId    String?
   projectId    String?                         // link to project tag
   createdAt    DateTime                        @default(now())