From https://freexian-team.pages.debian.net/debusine/reference/devel-blueprints/dynamic-storage.html, we have the following additional features needed in various management commands. This assumes that #682 has been completed first. * [x] Add options to `debusine-admin scope manage` to allow modifying the set of file stores for a scope. (Note that this potentially includes enabling or disabling the shared local storage, which is a store.) * [x] Add a `debusine-admin scope show` command, showing data including a brief tabular representation of the contents of the scope's file stores. A file store with no files has either never been populated or has been drained, and can safely be removed. * [x] Add a `debusine-admin delete_file_store` command, mirroring the existing `debusine-admin create_file_store`. It must refuse to delete a file store that still contains files (unless `--force` is used), and suggest that the store be drained first. (!1614) Report time in #539.