fix bug escape and websocket conenction

app.py

@@ -127,8 +127,8 @@ if not DEBUG:  # Chỉ thêm middleware kiểm tra database trong production
 app.include_router(mongodb_router)
 app.include_router(postgresql_router)
 app.include_router(rag_router)
-app.include_router(pdf_router)
 app.include_router(websocket_router)
+app.include_router(pdf_router)
 
 # Root endpoint
 @app.get("/")