List the tenant's legs, newest-created first by default. Every filter is optional. With none, the whole leg set is returned. status narrows to a routing worklist, e.g. status=Unrouted for every leg still awaiting a tour, and may be repeated to union several statuses. from and to bound the legs' creation time. shipmentId or tourId narrows to one shipment's or one tour's legs — the two are mutually exclusive, and either returns the complete matching set in a single page (both are bounded; a shipment carries at most ten legs). Cursor-paginated otherwise: follow cursors.after to fetch the next page.