enhance(backend): DBのコラム設定としてcreatedAtの値を入れるように/お知らせ機能API修正

packages/backend/test/unit/AnnouncementService.ts

@@ -10,6 +10,7 @@ import { ModuleMocker } from 'jest-mock';
 import { Test } from '@nestjs/testing';
 import { GlobalModule } from '@/GlobalModule.js';
 import { AnnouncementService } from '@/core/AnnouncementService.js';
+import { AnnouncementEntityService } from "@/core/entities/AnnouncementEntityService.js";
 import type { MiAnnouncement, AnnouncementsRepository, AnnouncementReadsRepository, UsersRepository, MiUser } from '@/models/_.js';
 import { DI } from '@/di-symbols.js';
 import { genAidx } from '@/misc/id/aidx.js';
@@ -61,6 +62,7 @@ describe('AnnouncementService', () => {
 			],
 			providers: [
 				AnnouncementService,
+				AnnouncementEntityService,
 				CacheService,
 				IdService,
 			],