G12 dc1: dc-rack-net.sh dc1 site-table arm + harness (D-131 sub-1) ...

Adds the dc1 arm to the standing per-DC rack-legs + node-DNS forwarder
pattern. MEASURED/apex-committed values, network-name keyed (no virbrN):
- vr1-dc1-metal-admin 10.12.68.2/22 (rack MAAS/DHCP; apex-committed rack IP)
- vr1-dc1-metal-admin 10.12.68.3/22 (forwarder listen alias; D-120 static)
- vr1-dc1-provider-public 10.12.64.2/22 (edge-LAN; measured live 2026-07-23)
- upstream region BIND 10.10.0.20 over transit

Harness T15-T18 added; dc-rack-net 18/18, gauntlet ALL GREEN (76),
repo-lint 0-fail. The forwarder pre-empts dc0's commissioning SERVFAIL.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VUjEb7onHpdqFHUnio6iVw

G12 dc1: edge bootstrap + v4 addressing COMPLETE (D-112c + D-113a2 proven on 26.7) ...

Edge phase for vr1-dc1, resuming the 2026-07-22 close handoff:
- D-112(c) console bootstrap: SSH + dc1 edge key materialized (payload
  needed util.inc/shell_safe() -- dc0 lesson iv the .b64 artifact lacked)
- key-only SSH verified (15.1-RELEASE-p1)
- D-113(a2) API key minted via vendor model; GET core/firmware/status
  exit 0, product_abi 26.7
- edge addressed: WAN 172.30.3.2/24 gw 172.30.3.1 (egress 0% loss),
  LAN -> 10.12.64.1/22 (ruled provider-public gw), API at new LAN
- interim reach leg removed; rack provider-public leg 10.12.64.2/22 live
- creds consolidated to ~/vr1-dc1-creds/ (creds-audit CLEAN); rack edge-key
  copy shredded -> SEC-015 (transient, remediated)

Two queued findings: bootstrap .b64 missing util.inc; opnsense-bootstrap-apikey.sh
scp transient post-restart-sshd failure (readiness-wait/retry candidate).

CURRENT-STATE G12 row + security-ledger SEC-015 + manifest updated (GA-R1/C1).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VUjEb7onHpdqFHUnio6iVw