Order Management
Orders are created on the MP, accepted or rejected via Link, then progress with hand-offs back to the MP.
New → confirm/reject: MP submits the order on POST /orders; Link returns 202 immediately
(queued). Final accept or reject is delivered asynchronously to your webhook_url as
order.confirmed or order.rejected (with external_reference and, for reject, a reason).
Ready: Restaurant signals ready; Link sends order.ready to your webhook URL.
Cancel: MP → Link order.cancel on POST /orders (HTTP 202). Restaurant-side cancels
reach your webhook as order.cancelled.
Order Management Operations
