feat(otel): add ITraceable to compensation events (SAGA)

[falberthen]

Refactored

• Add ITraceable to CancelPayment and RequestCancelPayment to extend span enrichment coverage so order.id flows through the cancellation/compensation path. RequestCancelPayment now carries OrderId explicitly to satisfy GetSpanTags() without reaching into the aggregate.
• Split OrderSaga compensation handlers into a partial class OrderSaga.Compensation.cs holds failure/compensation event handlers.
• Correct the CancelPaymentAsync parameter order and regenerate the Kiota client.
• Include OrderId in CancelPayment request contract Threads OrderId from the HTTP request through to the CancelPayment
  command so the cancellation span can be tagged with order.id end-to-end.