Register a rep intro video and get its private upload target
Idempotent on client_intro_id. A replay returns the intro's current status and never changes other intros. At most 10 per visit per day.
POST
https://api.channelautomation.com/api/field-sales/rep/introsReturns
201
{ intro: { id, status }, upload: { bucket, path, endpoint, max_bytes } }