feat: make name + scope combi unique

migrations/00013_add_group_role_permission.sql

@@ -17,8 +17,10 @@ CREATE TABLE roles (
 -- PERMISSIONS
 CREATE TABLE permissions (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid (),
-    name TEXT NOT NULL UNIQUE,
+    name TEXT NOT NULL,
-    description TEXT
+    scope TEXT NOT NULL,
+    description TEXT,
+    UNIQUE (name, scope)
 );
 
 -- USER-GROUPS (many-to-many)