List the refunds against an order

List every refund that has been recorded against the order, across every payment. Refunds carry the amount, status, the payment they were issued against, operator notes, and how the refund was allocated across basket items / revenue centres.

Optionally filter with revenue_centre to return only refunds that allocate to that centre. The response is not paginated; most orders have a handful of refunds at most.

To create a new refund, use POST /shop/orders/{orderId}/payments/{paymentId}/refunds.