doc: 增加注释

apps/wpm/services.py

@@ -37,6 +37,7 @@ def make_sflogs(mgroup: Mgroup, start_date: datetime.date, end_date: datetime.da
         while current_date <= end_date:
             start_time = datetime.datetime.combine(current_date, start_time_o)
             end_time = datetime.datetime.combine(current_date, end_time_o)
+            # 以下代码是解决跨天排班时生成当天班次缺少的bug
             if start_time > end_time:
                 if end_time.hour == 0:
                     end_time += datetime.timedelta(days=1)