LIVE (gated): carved the .7 router's two legs (metal-admin 10.12.8.7 +
provider-public 10.12.4.7 VLAN 5002, no br-ex) via the new aux-carve;
check pass=8/0. MAAS-deployed jammy -> Deployed, sshd live on 10.12.8.7.

State: dc0 .7 = carved-and-ready. Two JOIN prerequisites remain, both
off-session: (a) tagged pre-auth key + Headscale autoApprovers/ACL
(operator key is PLAIN; join NOT attempted); (b) SSH access via
vr1-office1-svc (region injects only that key; operator holds it).

CURRENT-STATE tailscale block + changelog Items 3-5 updated; dc1 ruling
recorded (build vr1-dc1-region first, no migration).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Fg98z7QyzwYUs8fsWCn728