Changed return json format

svc/router.py

@@ -146,7 +146,7 @@ def deep_eval_suite(request: DeepEvalSuiteRequest):
     threading.Thread(target=run_in_background, daemon=True).start()
 
     # ✅ Immediately respond
-    return TaskResponse(results={"status": "Evaluation started in background"})
+    return TaskResponse(results=json.dumps({"status": "Evaluation started in background"}))