Fix: チャンネルのフォロー・アンフォローの反映速度を改善 (#12149)

* チャンネルのフォロー・アンフォローの反映速度を改善

* fix lint

* userFollowingChannelsCacheの場所をCacheServiceからChannelFollowingServiceに移動

---------

Co-authored-by: osamu <46447427+sam-osamu@users.noreply.github.com>

packages/backend/src/server/api/stream/Connection.ts

@@ -13,6 +13,7 @@ import { bindThis } from '@/decorators.js';
 import { CacheService } from '@/core/CacheService.js';
 import { MiFollowing, MiUserProfile } from '@/models/_.js';
 import type { StreamEventEmitter, GlobalEvents } from '@/core/GlobalEventService.js';
+import { ChannelFollowingService } from '@/core/ChannelFollowingService.js';
 import type { ChannelsService } from './ChannelsService.js';
 import type { EventEmitter } from 'events';
 import type Channel from './channel.js';
@@ -42,6 +43,7 @@ export default class Connection {
 		private noteReadService: NoteReadService,
 		private notificationService: NotificationService,
 		private cacheService: CacheService,
+		private channelFollowingService: ChannelFollowingService,
 
 		user: MiUser | null | undefined,
 		token: MiAccessToken | null | undefined,
@@ -56,7 +58,7 @@ export default class Connection {
 		const [userProfile, following, followingChannels, userIdsWhoMeMuting, userIdsWhoBlockingMe, userIdsWhoMeMutingRenotes] = await Promise.all([
 			this.cacheService.userProfileCache.fetch(this.user.id),
 			this.cacheService.userFollowingsCache.fetch(this.user.id),
-			this.cacheService.userFollowingChannelsCache.fetch(this.user.id),
+			this.channelFollowingService.userFollowingChannelsCache.fetch(this.user.id),
 			this.cacheService.userMutingsCache.fetch(this.user.id),
 			this.cacheService.userBlockedCache.fetch(this.user.id),
 			this.cacheService.renoteMutingsCache.fetch(this.user.id),