Two refusals the first live connections met. A user in the MESH account was told
"JetStream not enabled for account" the first time it bound a consumer: with
accounts defined, JetStream is enabled per account, not only globally — the
account's setting, which the mesh owns, not the server's block, which it does not.
And the control plane's client used a random inbox prefix where it is granted
exactly _INBOX.<its user>.>, so the server's first answer could not reach it. The
prefix now follows from the user in the URL, for every principal that dials so.
jschoubben