New GPS Status Webhook Actions

New webhook actions are now available in the public Shipper API for tracking when GPS tracking turns on or off for vehicles in transit:

Action	Is sent when...
vehicle.gps_activated	GPS tracking becomes active for picked-up vehicles
vehicle.gps_deactivated	GPS tracking is deactivated after going stale (no location update for more than one hour)

Both actions carry a vehicle_guids array and a gps_active boolean indicating the new tracking state. Events are grouped per shipper, so a single notification may cover multiple vehicles.

See the Webhooks documentation for the full subscription flow and payload reference.