NHS App API - allow a single communication request to send both in-app message and push notification
A common use case of the NHS App API is to send citizens an in-app message, with an associated native push notification alerting the recipient to the existence of that message.
It should be made possible for API consumers to send a single API request to send both the in-app message and associated push notification. Further, there should be a dependency between these, such that the push notification is only sent after the in-app message has been successfully sent.