Every fault the drill's doctor diagnoses is a user's fault first: a
wedged Incus daemon, a dnsmasq that silently isn't serving, a VPN
resolver boxes inherit, isolation claimed by config but off in the
kernel — each has killed a cold mint or weakened a boundary, with a
cloud-init error that names none of them. The CLI half-admitted it:
cmd_new's failure path hand-pointed at issue #33, doing one special
case of a doctor's job inline.
The verb delegates to the installed drill/doctor.sh (the tree ships
whole) — one hardened script, two audiences. Its flags pass through;
the verdict now reads 'fit to mint boxes (and to drill)'; the mint-
failure hint ends with 'claudebox doctor' instead of the hand-rolled
diagnosis.
Closes#46
