feat(parcel-sync): store UATs in PostgreSQL, eliminate repeated eTerra calls

- GisUat table now includes workspacePk column (created via raw SQL)
- GET /api/eterra/uats serves from PostgreSQL  instant, no eTerra login needed
- POST /api/eterra/uats triggers sync check: compares county count with DB,
  only does full eTerra fetch if data differs or DB is empty
- Frontend loads UATs from DB on mount (fast), falls back to uat.json if empty
- On eTerra connect, fires POST to sync-check; if data changed, reloads from DB
- Workspace cache populated from DB on GET for search route performance

src/modules/parcel-sync/components/parcel-sync-module.tsx

@@ -325,11 +325,31 @@ export function ParcelSyncModule() {
   }, []);
 
   useEffect(() => {
-    // Load static UAT data as fallback
-    fetch("/uat.json")
+    // Load UATs from local DB (fast — no eTerra needed)
+    fetch("/api/eterra/uats")
       .then((res) => res.json())
-      .then((data: UatEntry[]) => setUatData(data))
-      .catch(() => {});
+      .then(
+        (data: {
+          uats?: UatEntry[];
+        }) => {
+          if (data.uats && data.uats.length > 0) {
+            setUatData(data.uats);
+          } else {
+            // DB empty — fall back to static uat.json (no county/workspace)
+            fetch("/uat.json")
+              .then((res) => res.json())
+              .then((fallback: UatEntry[]) => setUatData(fallback))
+              .catch(() => {});
+          }
+        },
+      )
+      .catch(() => {
+        // API failed — fall back to static uat.json
+        fetch("/uat.json")
+          .then((res) => res.json())
+          .then((fallback: UatEntry[]) => setUatData(fallback))
+          .catch(() => {});
+      });
 
     // Check existing server session on mount
     void fetchSession();
@@ -342,33 +362,34 @@ export function ParcelSyncModule() {
   }, [fetchSession]);
 
   /* ════════════════════════════════════════════════════════════ */
-  /*  Fetch enriched UAT list (with county + workspace) when       */
-  /*  connected to eTerra. Falls back to static uat.json.          */
+  /*  Sync UATs from eTerra → DB on connect (lightweight check)    */
   /* ════════════════════════════════════════════════════════════ */
 
   useEffect(() => {
     if (!session.connected || enrichedUatsFetched.current) return;
     enrichedUatsFetched.current = true;
 
-    fetch("/api/eterra/uats")
+    // POST triggers sync check — only does full fetch if data changed
+    fetch("/api/eterra/uats", { method: "POST" })
       .then((res) => res.json())
       .then(
-        (data: {
-          uats?: {
-            siruta: string;
-            name: string;
-            county: string;
-            workspacePk: number;
-          }[];
-        }) => {
-          if (data.uats && data.uats.length > 0) {
-            setUatData(data.uats);
+        (data: { synced?: boolean }) => {
+          if (data.synced) {
+            // Data changed — reload from DB
+            fetch("/api/eterra/uats")
+              .then((res) => res.json())
+              .then(
+                (fresh: { uats?: UatEntry[] }) => {
+                  if (fresh.uats && fresh.uats.length > 0) {
+                    setUatData(fresh.uats);
+                  }
+                },
+              )
+              .catch(() => {});
           }
         },
       )
-      .catch(() => {
-        // Keep static uat.json data
-      });
+      .catch(() => {});
   }, [session.connected]);
 
   /* ════════════════════════════════════════════════════════════ */