fix bug

app/core/response.py

@@ -5,11 +5,13 @@ from datetime import datetime
 from typing import TypeVar, Generic
 from fastapi import status
 import json
-
+from decimal import Decimal
 class CustomJSONEncoder(json.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, datetime):
             return obj.strftime('%Y-%m-%d %H:%M:%S')
+        elif isinstance(obj, Decimal):
+            return float(obj)
         return super().default(obj)
 
 class CustomJSONResponse(JSONResponse):