message: fix: ensure setting operator to `None`
diff: @@ -297,7 +297,7 @@ class ExtraCache:
  for flt in form_data.get("adhoc_filters", []):
  val: Union[Any, List[Any]] = flt.get("comparator")
  - op: str = flt["operator"].upper() if "operator" in flt else None
  + op: str = flt["operator"].upper() if flt.get("operator") else None
  # fltOpName: str = flt.get("filterOptionName")
  if (
  flt.get("expressionType") == "SIMPLE"
  