Send a push notification to verify a payee batch

Starts verification of a payee batch by sending a push notification to a device belonging to the logged-in user, as an alternative to the one-time password variant.

Use this after adding or removing payees, passing the operationBatchId from that response as id. Only start this when the batch state is PENDING_CHALLENGE.

The device must have been enrolled beforehand through /authentication_factors/push/{channel}. The user approves the challenge on the device, so there is no code to collect and no verify call to make. Read the outcome with Get a batch of payees.