Transaction void and refund in-progress status

Transactions: when you void or refund a transaction, status now shows voiding or refunding while the request is still running instead of a generic processing label. You can tell active voids and refunds apart from ones that already finished or failed.

• Void and refund requests report voiding or refunding while in progress, so polling and webhooks are less likely to treat an in-flight request as stuck or complete.