feat: dbgpts modules bug fix (#1921)

Co-authored-by: 途杨 <tuyang.yhj@antgroup.com>
Co-authored-by: lhwan <1017484907@qq.com>
Co-authored-by: hustcc <i@hust.cc>

dbgpt/serve/flow/api/endpoints.py

@@ -153,7 +153,10 @@ async def update(
     Returns:
         ServerResponse: The response
     """
-    return Result.succ(service.update_flow(request))
+    try:
+        return Result.succ(service.update_flow(request))
+    except Exception as e:
+        return Result.failed(msg=str(e))
 
 
 @router.delete("/flows/{uid}")