feat: quiz and rbac

migrations/0056_admin_rbac.down.sql

@@ -0,0 +1,7 @@
+-- Restore the old flag for anyone who still has a role, so a rollback keeps
+-- them in the panel.
+UPDATE users SET role = 'admin' WHERE admin_role_id IS NOT NULL AND admin_blocked_at IS NULL;
+DROP INDEX IF EXISTS users_admin_role_idx;
+ALTER TABLE users DROP COLUMN IF EXISTS admin_blocked_at;
+ALTER TABLE users DROP COLUMN IF EXISTS admin_role_id;
+DROP TABLE IF EXISTS admin_roles;