Grade

Changes to 强制刷新当前用户的成绩缓存（清空 MongoDB 缓存并实时同步一次教务数据）

post/api/grade/update

Nov 4, 2026bbd151b5879f Revision changes
- info
  api tag Grade added
- info
  api tag GradeQuery removed
Oct 6, 2026880521a9d345 Revision changes
- info
  endpoint added