UNMEASURED-gap sweep: 14 deferred items closed; juju restore-backup CONFIRMED absent ...

Operator challenge: did the committee actually measure live state, or take
shortcuts? Answer: some of both. This commit is the accounting, plus the sweep
that closes what was closeable.

WHO DID WHAT, precisely, because the accounting matters:
- The apex was never polled by ANY lens. Lens 2 declared it out of scope and did
  so HONESTLY -- its UNMEASURED note explicitly warned "D-101's literals may
  exist in NetBox and simply not be carved into MAAS". No overclaim. But it is a
  key system that lens had reach and time to measure. Under-scoped, not dishonest.
- The two-day-old dump was MINE, in the correction, not an agent's.
- Sharpest instance of the general problem: lens 6 declared juju restore-backup
  unverifiable because "no Juju client exists on this host", while juju 3.6.27
  was installed on voffice1 and lens 5 was running juju help against it in the
  same session. One lens called impossible what another was measuring.

CLOSED BY THE SWEEP (14 items). The consequential ones:
- LIVE apex polled via netbox/office1-record-dump.py: 139 prefixes, 103 IPv6,
  ZERO added, ZERO removed vs the dump. The conclusion was right; the method was
  not, and that distinction is the whole point.
- juju restore-backup DOES NOT EXIST on 3.6.27 -- "not a juju command ... Did you
  mean: create-backup". L6-14 goes from flagged RISK to CONFIRMED DEFECT: Stage 6
  Step 9's D-104 restore drill and its DoD bullet are unsatisfiable as written.
- juju bind DOES exist as documented -- lens 6 was RIGHT to exclude it from L6-7
  rather than assert it wrong. A correctly-handled uncertainty.
- dc0 compute provider MACs measured (52:54:00:1b:19:e6 / 52:54:00:18:ab:b4),
  matching lib-hosts and CONFIRMING L3-8.
- curl present on both racks, so L4-13's hole is theoretical, not live.
- The pinned charm channels DO resolve (2024.1, 2.4, squid all present via juju
  info on voffice1) -- proving L4-2's root cause and its fix: P3's 33 warns are
  purely the missing juju binary on vcloud, not a charmhub problem.

NEW FINDING: preflight's "MAAS unreachable: 'maas admin subnets read' failed" is
a MISDIAGNOSIS -- the maas binary is simply ABSENT on vcloud. Together with the
absent juju (L4-2) and absent openstack (S-1), THREE separate preflight/deploy
failures on this jumphost are all "the client is not installed", and each is
reported as something else. A tool-absence must never be reported as a
target-unreachable. Its own DOCFIX.

STILL-OPEN gaps that are measurable and were NOT done are listed in the
register's section 3 explicitly, not buried: DC edge v6 state, repo-lint/gauntlet
on voffice1 (deferred on purpose -- that clone is 105 commits stale, so running
them today would measure a stale tree), voffice1 transit reboot-durability, and
the provenance of RETROFIT_WAIT=30m.

STANDING LESSON added for the next committee: before declaring an item
unmeasurable, VERIFY THE CONSTRAINT YOU ARE ASSERTING. The UNMEASURED escape
hatch is load-bearing for honesty and must not become a way to avoid looking.

Revert: git revert this commit; the register is new and the CURRENT-STATE
paragraph is additive.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf