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/test/misc/mock-resolver.ts

@@ -7,14 +7,10 @@ import type { Config } from '@/config.js';
 import type { ApDbResolverService } from '@/core/activitypub/ApDbResolverService.js';
 import type { ApRendererService } from '@/core/activitypub/ApRendererService.js';
 import type { ApRequestService } from '@/core/activitypub/ApRequestService.js';
-import { Resolver } from '@/core/activitypub/ApResolverService.js';
 import type { IObject } from '@/core/activitypub/type.js';
 import type { HttpRequestService } from '@/core/HttpRequestService.js';
-import type { InstanceActorService } from '@/core/InstanceActorService.js';
 import type { LoggerService } from '@/core/LoggerService.js';
-import type { MetaService } from '@/core/MetaService.js';
 import type { UtilityService } from '@/core/UtilityService.js';
-import { bindThis } from '@/decorators.js';
 import type {
 	FollowRequestsRepository,
 	MiMeta,
@@ -23,6 +19,9 @@ import type {
 	PollsRepository,
 	UsersRepository,
 } from '@/models/_.js';
+import { SystemAccountService } from '@/core/SystemAccountService.js';
+import { bindThis } from '@/decorators.js';
+import { Resolver } from '@/core/activitypub/ApResolverService.js';
 
 type MockResponse = {
 	type: string;
@@ -43,7 +42,7 @@ export class MockResolver extends Resolver {
 			{} as NoteReactionsRepository,
 			{} as FollowRequestsRepository,
 			{} as UtilityService,
-			{} as InstanceActorService,
+			{} as SystemAccountService,
 			{} as ApRequestService,
 			{} as HttpRequestService,
 			{} as ApRendererService,