[loop-cycle] refactor: add docstrings to 20 undocumented classes (#1130) (#1166)

src/infrastructure/notifications/push.py

@@ -21,6 +21,7 @@ logger = logging.getLogger(__name__)
 
 @dataclass
 class Notification:
+    """A push notification with title, message, category, and read status."""
     id: int
     title: str
     message: str