Send a transactional Failover Message

Same lifecycle as POST /failover, but Viber steps are template-only (BM transactional compliance).

post/failover/transactional

Headers

Content-Typestring required

Authorizationstring required

Transactional flow created; first step submission attempted.

trackingIdstring

flowKind'standard' | 'transactional'

Present on create response; standard for POST /failover, transactional for POST /failover/transactional.

createdAtstring date-time