🦄 refactor(all): Seperate DB to repo

[fan9704]

DB operation move to repository

描述 Description

拆分 Repository 從 View 中的結構出來

相關的 Issues #(ticket number) / 無 Related Issues #(ticket number) / None

變更的類型 Change Type

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [X] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

影響的 API Affect API

• [X] Challenge
• [X] Submission
• [X] Team
• [X] Round
• [X] 不影響 API No affect API
• [ ] 其他（請填寫） Other(Please enter it)

相關的 資源或參考文件連結 Related Resource/Document Link

If this PR related some resource/document please offer link

檢查清單 Check List

- [ ] 我已經在本地手動測試過，確保功能的完整性和穩定性 I have done fully correct manual test

• [X] 我對我的程式碼進行了註解，特別是在難以理解的地方 I have added comment in my code
• [X] 我已經更新了文件，或者我的更改不需要更新文件 I have commented in document
• [X] 我的 PR 有明確的標題與內容描述 My PR has right title and description

[fan9704]

執行 HTTPS with Dev Mode

指令

python manage.py runserver_plus --key-file selftest-key --cert-file selftest-cert 0.0.0.0:8000

[fan9704]

@burnedinthesky 你試試看有沒有效果

我是測試沒問題

[fan9704]

驗證過後 我們再來 Merge