Add sync dashboard (port 3001) with real-time progress tracking

sync/package.json

@@ -6,6 +6,7 @@
   "license": "ISC",
   "type": "commonjs",
   "dependencies": {
+    "express": "^5.1.0",
     "mssql": "^12.2.0",
     "node-cron": "^3.0.3",
     "pg": "^8.13.3"