added this to make it safer at inserts when not enabled (#1876)

Author: Avi-Robusta

src/robusta/core/sinks/robusta/dal/supabase_dal.py

@@ -586,7 +586,7 @@ def get_active_namespaces(self) -> List[NamespaceInfo]:
         return [NamespaceInfo.from_db_row(namespace) for namespace in res.data]
 
     def __to_db_namespace(self, namespace: NamespaceInfo) -> Dict[Any, Any]:
-        db_job = namespace.dict()
+        db_job = namespace.dict(exclude_none=True)
         db_job["account_id"] = self.account_id
         db_job["cluster_id"] = self.cluster
         db_job["updated_at"] = "now()"