G12 dc1: item-3 substrate landed + harness reconcile (gauntlet 76 ALL GREEN) ...

Lands the disconnected session's authored tree (vr1_dc1 vars, vvr1-dc1 +
uplink modules, inner root vr1-dc1-substrate/ with 54 pre-pinned MACs,
lib-net dc1 arm + one-selection guard) and delivers changelog item 4:
six harnesses reconciled to the ratified dc1 selector arm, phase-00
PLANES/lib-net parity guard (exit 2, refuses cross-DC planning),
rbd-mirror + radosgw parent-shell selection (dc1 reminder now shows
10.12.84.0/22, not dc0's). Gauntlet ALL GREEN 76
(docs/audit/gauntlet-20260722-g12-reconcile.txt); repo-lint 0-fail.
G12 next gated step unchanged: operator-gated apex --commit.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VUjEb7onHpdqFHUnio6iVw

Session bookend (successor-landed): G12 dc1-authoring session disconnected mid-item-3 ...

Drop-state recorded, not delivered: dc1 vars + substrate root + lib-net dc1
arm authored UNCOMMITTED in tree; gauntlet 6/76 FAILED (six harnesses still
assert the retired vr1-dc1 fail-loud arm -- capture in docs/audit/). G12 row
updated same-commit (GA-R1/C1). Working-tree authoring intentionally left
uncommitted pending harness reconcile.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GksWgeVyXqhrojhKTiS8J5

G12 dc1: apex confirm-free captured; dc-rack-mgmt-import gains per-site (--site) dc1 support ...

Confirm-free vs live apex (read-only): dc1 planes already assigned+consistent,
transit 172.31.0.4/30 + rack 10.12.68.2 free, uplink 172.30.3.0/24 registered.
Importer harness 117/117; live dc1 dry-run preflight PASS (captures committed).
The apex --commit remains an operator-gated step.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VifVpH3XQQxQz8NQ1VxNau