fix(backend): update and re-enable Bull Dashboard

[zyoshoka]

What

Bull Dashboard は #14594 で無効化されていましたが Fastify 5 対応のリリースが出ましたので使えるように戻します。

Why

ないと不便ですので

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 39.75%. Comparing base (15f2e14) to head (c351a10).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ages/backend/src/server/web/ClientServerService.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #14648      +/-   ##
===========================================
- Coverage    39.75%   39.75%   -0.01%     
===========================================
  Files         1544     1544              
  Lines       193604   193618      +14     
  Branches      2561     3537     +976     
===========================================
- Hits         76972    76970       -2     
+ Misses      116069   116053      -16     
- Partials       563      595      +32     

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[github-actions]

Thank you for sending us a great Pull Request! 👍
Please regenerate misskey-js type definitions! 🙏

example:

pnpm run build-misskey-js-with-types

[github-actions]

このPRによるapi.jsonの差分
差分はありません。
Get diff files from Workflow Page

[syuilo]

🙏🏻