Re-export of camel_api::InFlightClaim — the context-global
accepted-not-completed RAII claim (drainclaim). The canonical
definition and contract live in camel_api::in_flight; this alias
keeps the historical camel_component_api::consumer::InFlightClaim
path stable. claimfamily: the type moved to camel-api so
camel_api::Exchange can carry it for stash-site residency.
One accepted-not-completed unit on the context-global in-flight
counter.
Receiver half of the consumer startup handshake. Resolves once the
consumer calls ConsumerContext::mark_ready (Ok) or its start()
returns an Err first (Err).