fix: file samples (#20364)

server/src/queries/asset.repository.sql

@@ -189,6 +189,8 @@ select
   ) as "files"
 from
   "asset"
+where
+  "asset"."libraryId" is null
 limit
   3
 

server/src/repositories/asset.repository.ts

@@ -349,6 +349,7 @@ export class AssetRepository {
           'files',
         ),
       ])
+      .where('asset.libraryId', 'is', null)
       .limit(sql.lit(3))
       .execute();
   }