fix(backend): ServerStatsService start within running app

[ZerglingGo]

What

Daemon service ServerStatsService can start/stop when updating enableServerMachineStats

Why

When changes enableServerMachineStats and save it, that not take effect in real-time.
Only after restarting the server will the settings take effect.

Additional info (optional)

Related commit: af3258d

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

Patch coverage has no change and project coverage change: -0.10% ⚠️

Comparison is base (44985ae) 78.89% compared to head (573af1b) 78.80%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #11342      +/-   ##
===========================================
- Coverage    78.89%   78.80%   -0.10%     
===========================================
  Files          925      174     -751     
  Lines        97587    22751   -74836     
  Branches      7749      511    -7238     
===========================================
- Hits         76993    17928   -59065     
+ Misses       20594     4823   -15771     

see 751 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[syuilo]

各エンドポイントには具体的な処理を書きたくないので、

misskey/packages/backend/src/core/MetaService.ts

Line 97 in e82c2e7

public async update(data: Partial<MiMeta>): Promise<MiMeta> {

内に書くと良さそう

[ZerglingGo]

@syuilo Please check the last commit

[syuilo]

CoreModuleからDaemonに依存するのは少し厄介になりそうなので、実装は今のままにし、UIで「サーバーの再起動が必要になります」と表示するようにします🙏

[ZerglingGo]

@syuilo では、Redis Subscriberを利用するのはどうでしょうか？

https://github.com/ZerglingGo/misskey/blob/84db3b730a3d82b6c2cf390ec1809e8c95154b0d/packages/backend/src/daemons/ServerStatsService.ts#L38-L56