Aftership Tracking

A tracking number identifies a shipment, not one unique update. AfterShip's webhook specification provides an event_id distinct from that shipment identity.

For the AfterShip Tracking integration, replay the same event and then deliver a different event for the same parcel. The duplicate should not create a second notification, but the genuinely new update must still be processed. Deduplicating only by tracking number would suppress legitimate progress.