feat: backend servis iskeletini ve yönetim uçlarını ekle

backend/app/telegram/auth.py

@@ -0,0 +1,8 @@
+from sqlalchemy.orm import Session
+
+from app.db import AuthorizedUserORM
+
+
+def is_authorized(session: Session, telegram_user_id: int) -> bool:
+    record = session.get(AuthorizedUserORM, telegram_user_id)
+    return bool(record and record.is_active)