fix(server): DriveFile related N+1 query when call note packMany (again) (#10190)

* Revert "Revert "fix(server): DriveFile related N+1 query when call note packMany (#10133)""

This reverts commit a7c82eeabc.

* packManyByIdsMap: 存在チェックをしてなかったものは null を入れるように

* Note.packMany で reply とか renote がもうあったらそのファイルも引く

* テストを書く

* fix test

* fix test

* fix test

* fix test

packages/backend/src/core/entities/GalleryPostEntityService.ts

@@ -41,7 +41,8 @@ export class GalleryPostEntityService {
 			title: post.title,
 			description: post.description,
 			fileIds: post.fileIds,
-			files: this.driveFileEntityService.packMany(post.fileIds),
+			// TODO: packMany causes N+1 queries
+			files: this.driveFileEntityService.packManyByIds(post.fileIds),
 			tags: post.tags.length > 0 ? post.tags : undefined,
 			isSensitive: post.isSensitive,
 			likedCount: post.likedCount,