D-125 correction: uplink /24 is the ruled 172.30.2.0/24, not a HELD tfvar (no new NetBox object) ...

The initial D-125 records wrongly modeled the vcloud ISP /24 as a NEW,
NetBox-assigned HELD value (`var.vr1_dc0_uplink_cidr`) with an OPNsense WAN
re-address. That is factually wrong: bridge-in is single-NAT, so there is
exactly ONE simulated-ISP /24 for vr1-dc0, and D-115 already ruled it
(172.30.2.0/24, role edge, site vr1-dc0). NetBox models the prefix by role+site
and does not care which libvirt host runs the NAT, so the /24's IPAM identity is
UNCHANGED from Model A; only the libvirt realization moved (a vcloud NAT bridged
through vvr1-dc0). OPNsense WAN stays .2. (Caught reconciling the "create netbox
objects" request against dc-edge-wan-import.py, which already registers this /24.)

- opentofu/main.tf: module vr1_dc0_uplink cidr = "172.30.2.0/24" inlined (ruled
  literal, matching the inner root's site-wan pattern) instead of the var.
- opentofu/variables.tf: REMOVED variable vr1_dc0_uplink_cidr (replaced with a
  note explaining why it is a ruled literal, not a tfvar).
- Records corrected everywhere the false claim propagated: D-125 body + D-122
  amendment, changelog-phaseC2-D125, model-a-fallback (B->A delta item 8 +
  revert), session-ledger, dc-dc-deployment-workflow, phase-2 runbook.

Net effect: D-125 adds NO new NetBox object and NO new HELD gate. The only
NetBox work left for the DC substrate is D-124's transit /30 + rack IP.

Both roots validate; gauntlet ALL GREEN (63); repo-lint 0 fail.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ck6xh3jWQi5b3Su8Dx1LEH

D-125: Model B per-DC ISP egress (bridge-in, single-NAT) -- resolves OBS-3 design gap ...

OBS-3: Model B nesting put vr1-dc0-wan (a libvirt NAT) inside vvr1-dc0, whose
only leg is the SEC-010 FORWARD-dropped transit -- so the per-DC simulated ISP
had no egress. Operator ruled bridge-in (single-NAT) over double-NAT.

- modules/wan-bridge (NEW): libvirt forward=bridge onto a pre-existing host
  bridge (bridge={name}, schema measured from the provider, not guessed). No
  subnet/NAT. Sibling to site-wan so every NAT user stays untouched. Covered by
  opentofu-validate S3 (standalone PASS).
- OUTER root: vcloud ISP NAT vr1_dc0_uplink (the single NAT) + a 2nd IP-less
  uplink NIC on vvr1-dc0 + the br-vr1-dc0-wan bridge declared in netplan (transit
  stays NIC1 so SEC-010/--transit-if keep keying on it). New HELD var
  vr1_dc0_uplink_cidr (no default; office1-netbox apex, hard rule 2).
- INNER root: vr1_dc0_wan site-wan(NAT) -> wan-bridge onto br-vr1-dc0-wan;
  OPNsense WAN re-addresses into the vcloud ISP /24 (edge config, D-113, HELD).
- Bootstrap (site-headend-install.sh): --uplink-if/--wan-bridge; --check verifies
  the bridge exists + uplink ENSLAVED (fail-open guard, same class as the transit
  check); SEC-010 rationale corrected (bridge-in has no inner NAT) + br_netfilter
  CONSTRAINT (keep the FORWARD-drop interface-scoped, NEVER global). Harness 49->54.

Records: D-125 (new); D-122 amendment (forward-pointer -- WAN realization
superseded, intent stands); SEC-010 (br_netfilter + hardened --check);
model-a-fallback B->A delta item 8 + revert; platform-traps 1g (bridge +
br_netfilter + nested-foreign-MAC trap).

NOT closed: the L2-NAT-of-foreign-MAC path is a DEPLOY-TIME gate (bridge-in
equivalent of the depth-4 boot gate); fallback = double-NAT. HELD: vr1_dc0_uplink_cidr
+ OPNsense WAN re-address. Both roots validate; gauntlet ALL GREEN (63); repo-lint
0 fail. Present-only; NOT pushed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ck6xh3jWQi5b3Su8Dx1LEH