OTA Channel Manager Order Processed
Event `ota_cm_order_processed`. Triggered when an async-submitted order has settled to a
terminal state (`Issued`, `Draft`, or `Error`). Your endpoint will receive this POST request.
Subscribing to this webhook lets partners avoid polling `getOrder`: receive the event, then call
`getOrder` once with the carried `orderId` to fetch the full order representation (wallets,
tickets, coupons, manifest URL).
