dev@locazia: fix content json_format time

app/core/models/node_storage.py

@@ -70,6 +70,6 @@ class StoredContent(AlchemyBase):
             "hash": self.hash,
             "cid": self.cid.serialize_v1(),
             "status": self.status,
-            "updated": self.updated,
-            "created": self.created,
+            "updated": self.updated.isoformat(),
+            "created": self.created.isoformat(),
         }