Administrator privileges to get and delete subscribers

migrations/20250930145931_add_role_to_users.sql

@@ -0,0 +1,7 @@
+CREATE TYPE user_role AS ENUM ('admin', 'writer');
+
+ALTER TABLE users ADD COLUMN role user_role;
+
+UPDATE users SET role = 'admin' WHERE role IS NULL;
+
+ALTER TABLE users ALTER COLUMN role SET NOT NULL;