Changes to 删除自定义课程（按 position 定位，CustomSchedule 无 id 字段）

delete/api/schedule/custom

Nov 4, 2026bbd151b5879f Revision changes
- info
  api tag Schedule added
- info
  api tag ScheduleQuery removed
Oct 7, 202660219fe3a218 Revision changes
- info
  added the new optional query request parameter courseId
Oct 6, 2026880521a9d345 Revision changes
- info
  endpoint added