Mark a LinkedIn conversation as read/seen.
Full conversation URN (e.g. 'urn:li:msg_conversation:(urn:li:fsd_profile:ACoAAXXX,2-YWUx...)')
Conversation marked as read
Credits consumed by this call (0 for free endpoints, cached results, or duplicates).
Seconds to wait before making another call of the same type. 0 means no wait needed.