mesh/delivery-group group feat/350-one-build-per-change checking: composed check out of date: novox/mesh-controller@cd49b50c4075 was judged against trunk bff5b…
A merge built every moved module a second time although its check had judged
the same tree (issue 649). The check now builds into the scratch namespace
under a reuse key (source fingerprint plus the builder's own digest), and the
walk of the trunk commit copies a build of the same key by digest instead of
building, saying per module why when it cannot (novox/hq ADR 0350).