mesh-wants' Wait gains clock-from, the step enum of section 203 with put, delivery, kept-build and backup,
fingerprint and machines, and requires step, module and since only (a put's wait has no part);
the runner's wait body gains clock-from. The runner's `step` already names pipeline steps: see the report.
Builds: design 47 G §498, §266, §269
Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ