Stage 4 OPEN + D-133 ADOPTED: flat per-NIC carve (VR1), hw-faithful NICs next deployment ...

Stage 4 (Phase 3, MAAS deploy per DC) opened on this branch: precondition
PASS, discovery captured read-only (docs/audit/stage4-discovery-20260723.txt),
runbook-vs-reality deltas + open decision points recorded in CURRENT-STATE
(same commit, GA-R1 C1). D-133 records the operator ruling (utterance quoted,
GA-R5): VR1 planes carve flat on dedicated NICs -- no VLAN-103 stack; next
deployment builds node VMs with target-hardware-exact NIC topology
(bonds/trunks). Affected stale surfaces queued in the entry, not edited.

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