Irreversibly nullifies a pass, removing all dynamic data (fields, images, barcode, NFC, localisation) while preserving the tombstone record for billing and auditability.
The pass will appear in the expired section of the wallet with a generic “Deactivated” design. The extId is preserved on the nullified record and can be reused when creating new passes.
This endpoint is idempotent — calling it on an already-nullified pass returns 200 with no further changes.