fix: アサーションの不足を修正

ecs/crm-datafetch/tests/test_check_object_info_process.py

@@ -46,6 +46,7 @@ class TestCheckObjectInfoProcess:
         assert actual_fetch_target_objects.is_update_last_fetch_datetime is True
         assert actual_fetch_target_objects.datetime_column == 'SystemModstamp'
         assert actual_fetch_target_objects.upload_file_name == f'CRM_Account_{execute_datetime.format_date()}'
+        assert actual_fetch_target_objects.last_fetch_datetime_file_name == 'Account.json'
 
         # ログの確認
         assert generate_log_message_tuple(log_message='I-CHK-01 オブジェクト情報形式チェック処理を開始します') in caplog.record_tuples