An unprotected snapshot is received through snapshot-get into
incoming/<request>, refused before the first chunk past the cap, checked
against its digest before any aside, and restored by the module; a
protected one is verified, the running data set aside and restored in
place by the keeper, waited on by snapshot-restored within
snapshot-restore-wait-minutes, cancelled at the bound. The bus module
sends its chunks with mesh-sdk's form.
Builds: design 47 G §681, §682, A-137, A-138, A-139, A-140
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h