fix cache bug in delete-repository

resources/sql/_ds_postgres_repository.sql

@@ -37,7 +37,8 @@ DROP TABLE :i:repository-table;
 --;;
 DELETE FROM :i:repositories-table
  WHERE id=:repository-name;
-
+--;;
+DELETE FROM :i:cache-table WHERE repository=:repository-name;
 
 
 -- :name update-repository!