ExperimentalReadonly ExperimentalattributionHuman-readable data attribution the host is obliged to display.
Readonly ExperimentalproviderProvider identifier, e.g. "osrm", "valhalla", "honua".
Optional Readonly ExperimentalusageUsage/acceptable-use policy for the configured endpoint, when known.
Identifies which provider produced a route and carries that provider's attribution / usage-policy obligations so hosts can surface them.