feat: queueing bulk follow/unfollow and block/unblock (#10544)

* wrap follow/unfollow and block/unblock as job queue

* create import job to follow in each iteration

* make relationship jobs concurrent

* replace to job queue if called repeatedly

* use addBulk to import

* omit stream when importing

* fix job caller

* use ThinUser instead of User to reduce redis memory consumption

* createImportFollowingToDbJobの呼び出し方を変える, 型補強

* Force ThinUser

* オブジェクト操作のみのメソッド名はgenerate...Data

* Force ThinUser in generateRelationshipJobData

* silent bulk unfollow at admin api endpoint

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Co-authored-by: tamaina <tamaina@hotmail.co.jp>

packages/backend/src/queue/RelationshipQueueProcessorsService.ts

@@ -0,0 +1,26 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { bindThis } from '@/decorators.js';
+import { RelationshipProcessorService } from './processors/RelationshipProcessorService.js';
+import type Bull from 'bull';
+import { DI } from '@/di-symbols.js';
+import type { Config } from '@/config.js';
+
+@Injectable()
+export class RelationshipQueueProcessorsService {
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		private relationshipProcessorService: RelationshipProcessorService,
+	) {
+	}
+
+	@bindThis
+	public start(q: Bull.Queue): void {
+		const maxJobs = (this.config.deliverJobConcurrency ?? 128) / 4; // conservative?
+		q.process('follow', maxJobs, (job) => this.relationshipProcessorService.processFollow(job));
+		q.process('unfollow', maxJobs, (job) => this.relationshipProcessorService.processUnfollow(job));
+		q.process('block', maxJobs, (job) => this.relationshipProcessorService.processBlock(job));
+		q.process('unblock', maxJobs, (job) => this.relationshipProcessorService.processUnblock(job));
+	}
+}