mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
- Any failure of a request the link may have delivered now says the line
may have run; "nothing ran" is said only of a request the link knows it
never asked (no link open, nobody listening: link.ErrNotAsked).
- A test holds that a connection saying nothing is answered within its
deadline, set at accept, and gives its slot back.
- The README says the socket refuses a process outside the machine's own
namespaces, so flatpak, toolbox and distrobox shells are refused.
