The build seat now runs the gate itself, judging a node-engine change with the change's
validator in the running controller because the module graph builds mesh-host from here.
This script is the repository's own layer (mesh/repo-check): format, vet, and the suite
under the race detector when the toolchain can.
merge-check.sh runs the suite, then builds the controller the mesh runs with this change's
validator in place of the one it vendors and runs the merge gate: a change to the node-engine
that would refuse what the mesh sends today fails its pull request, naming the machine. The
installer's first user list lets the controller say a check's verdict and hear a pull request's
head, as the controller now composes it.
jochen