DOCFIX-171: full-project sweep -- DC-DC runbook consistency fixes ...

Stage 1's calculator scripts (DOCFIX-162) were never wired into its own
Step 3 (still showed manual arithmetic) -- fixed to actually invoke them.
Stage 5's Sequence-list still tagged the IPv6 overlay [NOT YET WRITTEN]
after the Step 6 body was already updated -- fixed to match. Stage 6's
delivery checklist claimed its steps call the new Ceph replication
scripts when the step bodies still only showed raw commands -- added real
"PREFER scripts/dc-dc-..." pointers to each affected step. Also closed out
two DOCFIX numbers (164, 167) whose ledger entries never got their real
number written into the closing line during the earlier integration pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QrcJx8TUar7pYAvpGJw57A

DOCFIX-167: bundle.yaml -- Designate reactivation + D-108 DR mechanism (gaps #6+14) ...

Adds designate/designate-bind/designate-mysql-router/designate-hacluster
(D-106, supersedes D-019) and cinder-backup/ceph-rbd-mirror (D-108) to
bundle.yaml -- the same file this repo's jumphost uses against the live
VR0/DC0 rehearsal cloud, edited with corresponding care. Every new charm's
relation/binding shape was checked against its real metadata.yaml, not
guessed: caught and fixed three mistakes this way during self-review
(designate's real endpoint is dnsaas, not public; cinder-backup is a
subordinate with no amqp relation; ceph-rbd-mirror needs ceph-local/
ceph-remote, not a single invented binding key). Corrected ceph-mon's
rbd-mirror binding from storage to replication. Documents, rather than
invents, that ceph-remote (the peer DC's ceph-mon) needs a cross-model
relation or the manual CLI flow -- D-104's per-DC-independent-controller
design means it can't be a same-bundle relation line. Deliberately does
NOT reactivate os-public-hostname in this shared bundle (pushed to a
proposed per-DC overlay instead). Bundle parses clean (56 apps, 108
relations); provider-bundle-check.py PASS, all invariants unaffected.
Not applied to any live model.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QrcJx8TUar7pYAvpGJw57A

DOCFIX-157/158/159: Stage 4/6/7 runbooks -- MAAS deploy, DR drill, Designate/COS/Magnum ...

Completes all seven Stage 1-7 DC-DC runbooks (tooling gap register item #9
CLOSED):
- Stage 4 (MAAS enlist/commission/deploy, per DC): adapts phase-00's
  validated single-rack sequence per DC. Mandates the $DC selector
  convention (DOCFIX-151) and honestly documents that lib_hosts_select_dc
  will keep failing until this stage's own enrollment populates real host
  data. Names 7 real multi-rack gaps rather than working around them.
- Stage 6 (DR wiring and failover drill): implements Section 8's
  failover/failback skeleton, one-way-then-two-way per D-108. Found three
  real bundle.yaml gaps (missing cinder-backup/ceph-rbd-mirror charms,
  wrong-plane rbd-mirror binding) and makes fixing them the runbook's own
  first gated step. Includes a negative-control drill before the real one.
- Stage 7 (Designate, COS, Magnum/CAPI): quotes the bundle's actual
  current "NO designate" text before describing the D-106 reversal;
  identifies the reversal also affects the bundle's separate
  os-public-hostname posture; leaves COS's mechanism as an operator
  decision rather than inventing one.

Four new tooling-gap-register items (#12-15) added for cross-cutting
findings this runbook-authoring pass surfaced. None of the seven runbooks
have been executed against real infrastructure yet -- prep-only session.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QrcJx8TUar7pYAvpGJw57A