Full auth handlers, refactored swagger and some other changes

migrations/20260303130413_create_user.sql

@@ -7,6 +7,7 @@ CREATE TABLE IF NOT EXISTS users (
     password_hash   VARCHAR(255) NOT NULL,
     full_name       VARCHAR(150),
     avatar_url      VARCHAR(512),
+    role            VARCHAR(512),
     created_at      TIMESTAMPTZ DEFAULT NOW(),
     updated_at      TIMESTAMPTZ,
     last_login_at   TIMESTAMPTZ