The drill's E phase failed with `Instance has no static IPv4 address
assigned to be used as the connect IP`: Incus NAT-mode proxy devices
read the NIC's static ipv4.address device config, never the neighbour
table — the previous comment claimed otherwise. First cut pinned the
wrong address (docker0's), second cut removed the pin instead of
correcting it; this pins the box's current boxnet lease (same address
it already holds) before adding the device, and unpins when the last
exposure is removed.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>