fix: align task response time field serialization

app/schemas/schemas.py

@@ -1,6 +1,6 @@
 from pydantic import BaseModel
 from typing import Optional, List
-from datetime import datetime
+from datetime import datetime, time
 from enum import Enum
 
 
@@ -76,6 +76,7 @@ class TaskResponse(TaskBase):
     milestone_id: int
     reporter_id: int
     assignee_id: Optional[int] = None
+    estimated_working_time: Optional[time] = None
     resolution_summary: Optional[str] = None
     positions: Optional[str] = None
     pending_matters: Optional[str] = None