fix(#4546): deferred UAT follow-ups no longer block completion and promote to the backlog (#4769)

* test(#4546): failing-first tests for deferred uat follow-ups

* chore(#4546): regenerate derived lists for the deferred-promotion suite

The new verify-work-deferred-promotion suite changes the tests/ tree the
macOS conformance-tier classifier tracks and is a novel file under the
verify prefix in the test-file-count ratchet; both derived lists are
regenerated/registered per their own guards' instructions.

* fix(#4546): deferred uat follow-ups no longer block, and get promoted

Two halves of one disconnect (#1921's deferral design vs the completion
predicate):

- uat-predicate: the item parser now captures the block's reason: line
  alongside result:. A skipped item whose reason carries the
  verify-work writer's 'Deferred follow-up:' template is a deliberate
  deferral -- non-blocking, flagged deferred in the report. Quote-
  tolerant (the writer wraps the value) and case-insensitive. A
  reasonless skip, a non-deferral reason, pending/blocked/issue/
  failed/missing all still block, exactly as before.
- verify-work complete_session: when the Deferred Follow-Ups section is
  non-empty, offer to promote the items to a ROADMAP.md 999.x backlog
  entry reusing next.md's prior_phase_completeness entry shape, with a
  --files-scoped commit. Offer, not auto-mutation -- matches the
  workflow's interactive convention and next.md's own prompt style.

* chore(#4546): refresh compact-content benchmark baseline

verify-work.md grew (the #4546 deferred-follow-up promotion offer in
complete_session); the registered split's token counts moved with it.
Baseline recomputed with the script's own --write.

Emitted-Drift-Ack-Growth: verify-work.md — complete_session gained the deferred-follow-up promotion offer (detection, [P]/[K] choice, the next.md-shaped 999.x entry template, and the --files-scoped ROADMAP.md commit); the growth is the new contract text, not duplication

* fix(#4546): gate/audit agreement and review fixes for deferred follow-ups

- src/uat.cts categorizeItem: a skipped item carrying the deferred
  follow-up template reason now categorizes as 'deferred' (the category
  already existed for deferred-items.md entries) instead of being
  misfiled into the blocked families by keyword match -- the gate/audit
  agreement #3078-CR expects, restored in the permissive direction the
  #1921 design intends. Checked BEFORE the keyword families so '...
  on the release build next version' is not build_needed.
- verify-work.md promotion step: numbering scans for the smallest free
  999.n (count races + non-contiguous history), one backlog entry per
  deferred follow-up, ROADMAP.md-absent behavior specified, idea text
  newline-flattened, Deferred at placeholder harmonized with next.md.
- DEFERRED_REASON_RE: trust assumption documented (authoring contract,
  not a security boundary; non-matching spellings block fail-closed).
- tests: the property now drives evaluateUatPassed and derives
  expectations from the input spec (never restates the matcher),
  includes the no-result-line branch, and pins its seed; the parity
  test drops try/finally for the approved pattern, uses createTempDir,
  sites its allow-test-rule marker at the suppression site, and asserts
  the literal [P]/[K] choices.

* fix(#4546): close promotion-test docstring, drop fc replay-path misuse, refresh baseline

The final matrix run caught three defects in my own review-fix commit:
the parity test file's JSDoc was left unterminated (the whole file
parsed as one comment -- zero tests registered, hence the file-level
'test failed' the runner reported); fast-check's replay-path parameter
was misused as a label (invalid path at replay); and the workflow-text
ambiguity fixes re-drifted the compact-content benchmark baseline.

* docs(#4546): add Fixed changeset for deferred follow-up coverage

* docs(#4546): backfill changeset PR number

* fix(#4546): use the pattern seam escapeRegex for shape-marker matching

The hand-rolled metacharacter escape in the shape-marker assertion
tripped local/no-adhoc-regex-escape, whose named remedy this adopts.

---------

Co-authored-by: sim <sim@local>

scripts/lib/macos-conformance-tier.generated.cjs

@@ -193,6 +193,7 @@ module.exports = {
   "tests/state.test.cjs",
   "tests/todos-workstream-scope.test.cjs",
   "tests/tracer-bullet.test.cjs",
+  "tests/uat-predicate.test.cjs",
   "tests/uat.test.cjs",
   "tests/ui-safety-gate.test.cjs",
   "tests/ui-spec-inventory-provenance.test.cjs",

scripts/lint-test-file-count.allowlist.json

@@ -137,10 +137,11 @@
         "verify-npm-publish.test.cjs",
         "verify-test-quality.test.cjs",
         "verify-work-auto-transition.test.cjs",
+        "verify-work-deferred-promotion.test.cjs",
         "verify.test.cjs"
       ],
       "issue": "#3813 \u2014 the live-path #1883 suite drives buildPlanningSnapshot in-process with an fs fault; the verify module suites are CLI-driving and cannot host an fs monkeypatch",
-      "justification": "verify-command-grounding added by #2401/#3678; allowlist follow-up landed with #3606 (base was red on this lane)."
+      "justification": "verify-command-grounding added by #2401/#3678; allowlist follow-up landed with #3606 (base was red on this lane). #4546 adds verify-work-deferred-promotion (deferred-follow-up promotion writer contract + parity)."
     },
     "install": {
       "files": [