New Driver-Provided ETA Webhook Actions

New webhook actions are now available in the public Shipper API for tracking driver-provided ETA updates and driver location:

Action	Is sent when...
vehicle.pickup_eta_updated_by_driver	The driver updates the pickup ETA for a vehicle
vehicle.delivery_eta_updated_by_driver	The driver updates the delivery ETA for a vehicle
vehicle.driver_location_updated	The driver's GPS location is updated for picked-up vehicles

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