Lets the transform's rest-spread carry unmodeled backend fields through.
OptionaldateWindow key/date of this entry (historical range results).
Optionalis_True when the param is cumulative (e.g. an energy meter).
OptionalparameterBackend parameter identity, "<node_id>.<key>.<data_type>".
OptionalwindowsAggregates keyed by window type.
Raw API aggregate entry (snake_case).