Add CORS support for Vercel production domain

- Allow WebSocket and API connections from visualisable-ai.vercel.app
- Support all Vercel preview deployments with wildcard

backend/model_service.py

@@ -23,10 +23,16 @@ logger = logging.getLogger(__name__)
 
 app = FastAPI(title="Visualisable.ai Model Service", version="0.1.0")
 
-# CORS configuration for local development
+# CORS configuration for local development and production
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=["http://localhost:3000", "http://localhost:3001", "http://localhost:3002"],
+    allow_origins=[
+        "http://localhost:3000", 
+        "http://localhost:3001", 
+        "http://localhost:3002",
+        "https://visualisable-ai.vercel.app",
+        "https://*.vercel.app"
+    ],
     allow_credentials=True,
     allow_methods=["*"],
     allow_headers=["*"],