After the build ended the module pushes the packed bundle with mesh-sdk's PushBlob under
<module>/<artifact> by its digest, a candidate's as a trunk build's, and the step answers
artifact-store://<module>/<artifact>/blobs/<digest> instead of the archive's path. A push
that fails fails the step not stored: <artifact>: <the store's words>; the packed bytes are
never written to the node. The manifest requires artifact-store and places its address.
Each run step goes through mesh-sdk's buildstep.Isolated: no network, none of the account,
the workspace read-write, the toolchain read-only, the npm cache beneath a throwaway layer
unless the build step is told publish (a trunk build). The module declares the bubblewrap
package and refuses a step, unhealthy, while bwrap is missing or older than 0.10. The proof
test runs a probe script through the real test step.