feat: more role backend and admin/writer roles additions and adjustments

features/roles_permissions_foundation.qa.md

@@ -1,5 +1,7 @@
 # QA procedure: roles_permissions_foundation
 
+> Superseded in part by roles_permissions_enforcement: the owner and admin 403 clauses now answer 403 "missing_permission" with the header X-Missing-Permission, decided by the caller's role permissions. An Admin can now invite and write sites, and a role without the needed permission is refused on routes that were open to every verified user.
+
 Package: `test` (black-box). Name new fakes uniquely, for example `mockRoleRepo`, `rolesFoundationUserRepo`.
 Do not copy the old `Role ==` checks into new code.