Extract maestroTransport() (Maestro's identity cert + instance CA) and
expose PeerTransport()/Scheme()/InsecureInternal() so every service peer
edge uses the same client. RunAction now targets
https://{ip}:{port}/action/{name} presenting Maestro's cert (services
require a CA-issued client cert, so only Maestro can drive actions — T4)
and FetchManifestWithRetry fetches /_manifest the same way.
INSECURE_INTERNAL=1 keeps the dev fleet plaintext (debug compose updated
to set it).
Admin