[MyPage] 정보가져오기 쿼리문 수정

### ISSUE
- Group: `server`
- Type: `feature`
- Detail: 내가 작성한 글, 커밋, 댓글에 대해서 마이페이지로 이동 할 때 가져올 수 있다.

### TODO
1. [ ] 마이페이지 해당 정보 가져오기

### Estimated time
### `2.5h`

### Labels
- Estimated time: `E: 2.5h`
- Group : `server`
- Sprint: `Sprint__NUMBER__`
- Urgency: `High`, `Middle`, `Low`

Start by locating the server entry point and query used when opening MyPage. Trace how the user's posts, commits, and comments are fetched. The work is done when all three kinds of information can be retrieved for the MyPage view; no file or test is named in the issue.

Written by the indexing model from the issue text.