feat: improve performance for GET /api/album & /api/album/:id (#17124)

* fix(server) optimize number of sql calls for GET /api/albums

remove unnecessary join for getMetadataForIds
remove separate call to getLastUpdatedAssetForAlbumId

* fix(server) remove unnecessary getLastUpdatedAssetForAlbumId call for GET /api/album/:id

also remove getLastUpdatedAssetForAlbumId query as it is no longer referenced

* fix(server): correct lastModifiedAssetTimestamp return type + formatting and typing

* chore(server): address type issue with tests found via npm:check

tests & lint still pass before this commit.

server/src/repositories/asset.repository.ts

@@ -728,17 +728,6 @@ export class AssetRepository {
     return paginationHelper(items as any as AssetEntity[], pagination.take);
   }
 
-  getLastUpdatedAssetForAlbumId(albumId: string): Promise<AssetEntity | undefined> {
-    return this.db
-      .selectFrom('assets')
-      .selectAll('assets')
-      .innerJoin('albums_assets_assets', 'assets.id', 'albums_assets_assets.assetsId')
-      .where('albums_assets_assets.albumsId', '=', asUuid(albumId))
-      .orderBy('updatedAt', 'desc')
-      .limit(1)
-      .executeTakeFirst() as Promise<AssetEntity | undefined>;
-  }
-
   getStatistics(ownerId: string, { isArchived, isFavorite, isTrashed }: AssetStatsOptions): Promise<AssetStats> {
     return this.db
       .selectFrom('assets')