enhance(backend): refine system account (#15530)

* wip

* wip

* wip

* Update SystemAccountService.ts

* Update 1740121393164-system-accounts.js

* Update DeleteAccountService.ts

* wip

* wip

* wip

* wip

* Update 1740121393164-system-accounts.js

* Update RepositoryModule.ts

* wip

* wip

* wip

* Update ApRendererService.ts

* wip

* wip

* Update SystemAccountService.ts

* fix tests

* fix tests

* fix tests

* fix tests

* fix tests

* fix tests

* add print logs

* ログが長すぎて出てないかもしれない

* fix migration

* refactor

* fix fed-tests

* Update RelayService.ts

* merge

* Update user.test.ts

* chore: emit log

* fix: tweak sleep duration

* fix: exit 1

* fix: wait for misskey processes to become healthy

* fix: longer sleep for user deletion

* fix: make sleep longer again

* デッドロック解消の試み

https://github.com/misskey-dev/misskey/issues/15005

* Revert "デッドロック解消の試み"

This reverts commit 266141f66f.

* wip

* Update SystemAccountService.ts

---------

Co-authored-by: おさむのひと <46447427+samunohito@users.noreply.github.com>
Co-authored-by: zyoshoka <107108195+zyoshoka@users.noreply.github.com>

packages/backend/src/server/api/endpoints/reset-db.ts

@@ -6,9 +6,12 @@
 import { Inject, Injectable } from '@nestjs/common';
 import { DataSource } from 'typeorm';
 import * as Redis from 'ioredis';
+import { LoggerService } from '@/core/LoggerService.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { DI } from '@/di-symbols.js';
 import { resetDb } from '@/misc/reset-db.js';
+import { MetaService } from '@/core/MetaService.js';
+import { GlobalEventService } from '@/core/GlobalEventService.js';
 
 export const meta = {
 	tags: ['non-productive'],
@@ -36,13 +39,27 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 		@Inject(DI.redis)
 		private redisClient: Redis.Redis,
+
+		private loggerService: LoggerService,
+		private metaService: MetaService,
+		private globalEventService: GlobalEventService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			if (process.env.NODE_ENV !== 'test') throw new Error('NODE_ENV is not a test');
 
-			await redisClient.flushdb();
+			const logger = this.loggerService.getLogger('reset-db');
+			logger.info('---- Resetting database...');
+
+			await this.redisClient.flushdb();
 			await resetDb(this.db);
 
+			// DIコンテナで管理しているmetaのインスタンスには上記のリセット処理が届かないため、
+			// 初期値を流して明示的にリフレッシュする
+			const meta = await this.metaService.fetch(true);
+			this.globalEventService.publishInternalEvent('metaUpdated', { after: meta });
+
+			logger.info('---- Database reset complete.');
+
 			await new Promise(resolve => setTimeout(resolve, 1000));
 		});
 	}