Update progress time info (#4193)

### What problem does this PR solve?

Ignore the millisecond and microsecond value.

### Type of change

- [x] Refactoring

Signed-off-by: jinhai <haijin.chn@gmail.com>

api/db/services/task_service.py

@@ -85,7 +85,7 @@ class TaskService(CommonService):
         if not docs:
             return None
 
-        msg = f"\n{datetime.now().strftime('%H:%M:%S.%f')} Task has been received."
+        msg = f"\n{datetime.now().strftime('%H:%M:%S')} Task has been received."
         prog = random.random() / 10.0
         if docs[0]["retry_count"] >= 3:
             msg = "\nERROR: Task is abandoned after 3 times attempts."