vboxes fix

backend/app/models/message.py

@@ -108,6 +108,11 @@ class Message(Base):
     children: Mapped[list["Message"]] = relationship(
         "Message", foreign_keys=[parent_message_id]
     )
+    labels: Mapped[list["Label"]] = relationship(  # type: ignore[name-defined]
+        "Label",
+        secondary="message_labels",
+        lazy="select",
+    )
 
     __table_args__ = (
         Index("idx_messages_tenant", "tenant_id"),