TARGETS

The lanes this host has, DEFAULT first — the schema's enum, the order they are described in, and what byTarget resolves against, so the three cannot drift apart.

Absent here means UNKNOWN, not "not ready": a dedicated server's client/render heartbeats are client mixins that never apply, and reporting a permanent absence as a transient state invites a retry that can only fail again. Not-ready stays for a lane this host HAS whose source is stopped right now.