Add domain field to shortlink API responses and sync script

app/api/shortlinks/route.ts

@@ -75,7 +75,8 @@ export async function GET(request: NextRequest) {
         favorites,
         expires_at,
         click_count,
-        unique_visitors
+        unique_visitors,
+        domain
       FROM shorturl_analytics.shorturl
       WHERE ${whereClause}
       ORDER BY created_at DESC