Brings #664 (licences_switches carried entries), #665 (mesh-files lists a
place a secret is kept), #666 (provisioner: bounded retiring ask id, a
refused ask said, provisioner_health), #667 (mesh-build-go's step end
rewritten without the taken versions when over the steps state's bound),
#668 (mesh-files find writes the NUL itself). #667's buildstep/step.go and
digestshape_test.go conflict with G's deletion (the step runner moved to
mesh-delivery-sdk/steprun, SD5): G's side is kept; its intent, an answer over
the bound not lost, is G's A-290 (the answer kept as an output object).
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
jschoubben
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