add scenarios methods

migrations/20260628175120_create_users_table.sql

@@ -5,7 +5,7 @@ CREATE TABLE
         username VARCHAR(50) NOT NULL UNIQUE,
         email VARCHAR(100) NOT NULL UNIQUE,
         password_hash VARCHAR(255) NOT NULL,
-        roles jsonb NOT NULL DEFAULT '[]'::jsonb,
+        roles JSONB NOT NULL DEFAULT '[]'::jsonb,
         is_active BOOLEAN DEFAULT TRUE,
         created_at TIMESTAMP NOT NULL DEFAULT NOW ()
     );