DOCFIX-208 part 3: graduate the dry-run instrument finding; harden Step 4.4 ...

The juju finding belongs above a changelog -- it generalizes to any bundle
deploy, not just phase-4's gate. platform-traps.md gains a Juju section: what
--dry-run prints, what it never prints at any verbosity, the two grep decoys
(controller API addresses look like DC-band VIPs; --debug echoes the command
line so overlay filenames hit), and the three consequences.

Step 4.4, written earlier this session and never run, gets two corrections
before its first execution: the --format=json read used a direct index, so a
missing key would print a traceback into a results column -- this repo has a
logged instance of an assertion satisfied by a traceback -- now .get() with a
visible <<UNSET-OR-APP-ABSENT>> sentinel documented as a failure. And the block
now states plainly that it is authored against a measured instrument but has
never been exercised, with the instruction to report a shape correction rather
than work around one.

repo-lint 0 fail / 1 legacy warn; gauntlet ALL GREEN (98).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf

DOCFIX-208 part 2: the dry-run graded the gate, and three items could not fail ...

The corrected dc0 command dry-ran EXIT 0 from the dc0 rack against an empty
vr1-dc0 model, staged input sha256-verified against HEAD first. Nine machines
0-8, all nine constraints tags=openstack-vr1-dc0,<role> in the 3/2/4 split,
all three overlays consumed. Capture: docs/audit/stage5-dryrun-dc0-20260802.txt.

The run also measured what the command can and cannot show. juju deploy
--dry-run on a bundle prints NO application options and NO VIPs at any
verbosity; --debug adds only the per-machine constraint lines. Greps over the
--debug capture: bridge-interface-mappings 0, physnet1 0, openstack-origin 0,
cloud-archive 0, prefer-chassis 0.

So three Step-4.2 gate items could not be graded by the command the gate names:
item 1 (tags) needed --debug, which is now in the named command; the
PRE-EXISTING VIP item could never have failed because no VIP is ever in the
plan, and its property is relocated in writing to preflight P2; and the two
option-reading items I added earlier this session had the same defect and are
removed within the hour. Their properties become new Step 4.4 -- a juju config
read run the moment deploy returns, which is the only thing that can prove
juju merged the options map rather than replacing it.

Both machines overlays' VERIFY-LIVE headers said to assert this "at the live
dry-run". Measured impossible; corrected in place, pointed at 4.4.

Also settles the deferred ceph-osd tags=openstack item (placed by explicit
placement, bare tag absent from the plan) and logs a contradiction not resolved
here: the runbook says the bundle ships NO designate, the plan deploys four
designate applications.

The deploy itself is NOT run -- 4.3 is a gated mutation.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf

DOCFIX-208: the dc0 deploy command was missing a load-bearing overlay ...

The phase-4 runbook told the operator to deploy vr1-dc0 WITHOUT
overlays/vr1-dc0-machines.yaml, on the stated grounds that the file does
not exist. It has existed since 2026-07-29. preflight.sh P2 folds it into
the merged input it validates, so P2 was grading an input the deploy would
not have passed.

Re-measured by deep-merging bundle.yaml against the overlay: SIXTEEN
applications carry a delta, not the one this repo recorded on 2026-07-31.
ovn-chassis.bridge-interface-mappings (whose ONLY source is this overlay --
bundle.yaml:494 forbids re-adding it there) plus 15 mirror repoints from
the 2026-07-31 UCA ruling. Deploying as written would have taken two
injuries, neither surfacing as a deploy error: no br-ex mapping (dead
provider egress) and 15 charms pointed at a UCA measured unreachable from
a node under the D-107 airgap.

Corrected at 6 sites (4.1 table + prose, 4.2 dry-run, 4.3 deploy, Step 7
dry-run + its rules sentence, 4.2 VERIFY-LIVE pointer). Step 4.2's gate
could not have caught any of it -- its four items read the machines block,
machine count and VIPs, while the overlay's whole payload is under
applications: -- so gate items 5 and 6 were added to assert the merged
ovn-chassis options map and the reachability of every origin/source.

preflight.sh needed no change: it was already right.

CURRENT-STATE corrects its own narrower 2026-07-31 finding in place
(GA-R1 C2). repo-lint 0 fail / 1 legacy warn.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf