Actions that exist only on the structured available_actions[].action
surface (absent from the deprecated flat valid_actions[] enum). Their
field bindings come from core/media-buy-available-action-id.json.
Empty when the schema cache predates that file.
Actions that exist only on the structured
available_actions[].actionsurface (absent from the deprecated flatvalid_actions[]enum). Their field bindings come fromcore/media-buy-available-action-id.json. Empty when the schema cache predates that file.