Stage-5 grounding audit: 7-lens read-only committee + live measurement sweep,
run before Stage 5 opens. NO STAGE OPENED OR CLOSED on this branch.

Brings onto main:
- 14 GA-R5 rulings (R1-R13, R15), 2 withdrawn as raised in error (R2a, R14),
  and gate G18 opened (blocking, deferred until the cloud is live).
  Authority for each is its D-number Status block in docs/design-decisions.md;
  questions + exact utterances in docs/audit/queued-rulings-20260727.md.
- Audit deliverables under docs/audit/: stage5-readiness-20260727.md (the
  ordered precondition checklist), stage5-committee-raw-20260727.md,
  stage5-live-measurement-20260727.txt, the unmeasured-gap register, and the
  R6-R15 measurement captures.
- Gate-integrity findings: three gates that could not fail (repo-lint over
  zero files, the gauntlet's uncompared harness count, preflight failing open
  on rc not in {1,2}) -- ruled fixed under R15, NOT yet built.
- Two decisions found RULED-BUT-NEVER-BUILT: D-134's per-DC bands and D-020's
  vault VIP.

Execution of every ruling remains LOGGED-NOT-EXECUTED. Merged under operator
direction 2026-07-27 ("Merge to main, then start Phase 0").

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