async fn handle_reactive_transcript_cross_channel(
state: &AppState,
params: &TranscriptQuery,
) -> ResponseExpand description
Fallback path for handle_reactive_transcript when the target agent
isn’t on this instance’s own host-tier registry — checks the host-global
cross-channel shared registry and, on a hit, forwards to the owning
channel’s own instance. A miss here (not found on this channel OR any
other channel on this host) 404s exactly as the host-only lookup always
did — this does not reach LAN or WAN (Phase A scope; see spec Phase B/C).