fix(daemon): Correct types in due date checks (#188)

Author: tcjennings

src/lsst/cmservice/common/daemon.py

@@ -18,11 +18,11 @@
 async def check_due_date(session: async_scoped_session, node: NodeMixin, time_next_check: datetime) -> None:
     """For a provided due date, check if the queue entry is overdue"""
 
-    due_date = node.metadata_.get("due_date", None)
+    due_date: int = node.metadata_.get("due_date", None)
     if due_date is None:
         return None
 
-    if time_next_check > due_date:
+    if time_next_check.timestamp() > due_date:
         campaign = await node.get_campaign(session)
         await notification.send_notification(for_status=StatusEnum.overdue, for_campaign=campaign)