Session close 2026-07-21: commissioning RESOLVED 9/9 Ready; D-131 proposed; SEC-014 opened ...

Lands the ops-commissioning-diag session's deliverable, whose close
bookend was lost to a session disconnect. Landed same-day by the
successor session after read-only re-verification (9/9 Ready, forwarder
active+enabled, dhcpd on both controllers, Phase-7 tag cleanup done).

- CURRENT-STATE: commissioning resolved (two stacked faults: MAC drift
  from the in-place apply; MAAS 3.7 rack-only agent resolver SERVFAIL);
  G10 remainder = netem step E only.
- design-decisions: D-131 PROPOSED (rack-only node DNS strategy).
- security-ledger: SEC-014 OPENED (rack cluster secret exposure).
- committee doc: closed by addendum.
- changelog + adjudication capture + as-executed index row.
- session-ledger: bounded close entry + machine-derived block re-seeded
  from the 2026-07-21 scan (D next-free 132, DOCFIX 197, BUNDLEFIX 052,
  10 open SEC rows).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01STHXiHfoxHqq8fGRVvb66G