fix(monitoring): add VERSION and BUILD_TS build args for local dev

Author: claude

docker-compose.local.yml

@@ -3,6 +3,9 @@ services:
   monitoring_flask_backend:
     build:
       context: ./monitoring_flask_backend
+      args:
+        VERSION: local-dev
+        BUILD_TS: "${BUILD_TS:-local}"
     image: postgresai/monitoring_flask_backend:local