ConfigSource:Mode = Direct (default, read central SQL) | FetchAndCache (fetch
the artifact from central over gRPC, read LocalDb). The validator fails host
start on a FetchAndCache shape that cannot fetch — no endpoints, a non-http(s)
endpoint, no shared key, or a non-positive timeout — because each otherwise
surfaces as a silent absence (a deploy that never applies). ConfigServe (the
central serve surface) takes a plain Configure: a 0 port is a valid "disabled".
Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW
Joseph Doherty