Book a signed LeadPerfection offer exactly once (calendar worker only)
Send-once saga. Status committed, rejected, slot_taken, provider_unknown (may have reached LeadPerfection; never resent), handoff or conflict. A replay of the same idempotency key returns the stored outcome without calling LeadPerfection.
POST
https://api.channelautomation.com/api/leadperfection/forward-look/internal/bookingsReturns
200
Booking outcome
