perf(backend): createdAtをidから取得するように & 無駄なDateインスタンスの生成を避けるように

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

@@ -17,6 +17,7 @@ import { deepClone } from '@/misc/clone.js';
 import { bindThis } from '@/decorators.js';
 import { isMimeImage } from '@/misc/is-mime-image.js';
 import { isNotNull } from '@/misc/is-not-null.js';
+import { IdService } from '@/core/IdService.js';
 import { UtilityService } from '../UtilityService.js';
 import { VideoProcessingService } from '../VideoProcessingService.js';
 import { UserEntityService } from './UserEntityService.js';
@@ -44,6 +45,7 @@ export class DriveFileEntityService {
 		private utilityService: UtilityService,
 		private driveFolderEntityService: DriveFolderEntityService,
 		private videoProcessingService: VideoProcessingService,
+		private idService: IdService,
 	) {
 	}
 
@@ -196,7 +198,7 @@ export class DriveFileEntityService {
 
 		return await awaitAll<Packed<'DriveFile'>>({
 			id: file.id,
-			createdAt: file.createdAt.toISOString(),
+			createdAt: this.idService.parse(file.id).date.toISOString(),
 			name: file.name,
 			type: file.type,
 			md5: file.md5,
@@ -231,7 +233,7 @@ export class DriveFileEntityService {
 
 		return await awaitAll<Packed<'DriveFile'>>({
 			id: file.id,
-			createdAt: file.createdAt.toISOString(),
+			createdAt: this.idService.parse(file.id).date.toISOString(),
 			name: file.name,
 			type: file.type,
 			md5: file.md5,