test(#2736): property-test parsePhaseFromProse name precedence (#2878)

#2821 reworked parsePhaseFromProse's NAME precedence (dash-vs-paren choice,
status-keyword tails, `Milestone:` tails, paren-stripped separator search, the
lone-ALL-CAPS-tail rule) but shipped it pinned only by hand-picked examples.

The two pre-existing property blocks cover phase-token ANCHORING (#2111) and
"N of M" phase extraction; neither touches name precedence. This adds nine
properties over the canonical parser.

P1 and P9 are the delta guards: both fail against the pre-#2821 paren-first
parser (proved with a standalone mutation harness), because each requires a
genuine em-dash name to win over a co-present parenthetical. P9 additionally
exercises the paren-stripped separator search, since the losing parenthetical
itself contains an em-dash.

P2-P4 are characterization tests for precedence contracts both parser versions
satisfy; P5-P8 pin totality and phase-token extraction, which #2821 left alone.
The section comment states which is which so a future reader does not mistake
the characterization tests for delta guards.

The generator's status-word exclusion filter is a test-local mirror of the
private, unexported STATUSY_TAIL_RE. A divergence-guard test pins that mirror
to observable parser behavior (not source text, which the no-source-grep rule
forbids), so an implementation vocabulary change fails loudly instead of
silently weakening every property that depends on the filter.

Also clears six pre-existing no-unused-vars lint warnings surfaced by the lint
run for this change (dead bindings in four unrelated test files, deleted rather
than underscore-renamed); removing the never-called openCodeBlock helper
cascaded to its now-unused fs/path/reviewPath consts in both fold scopes.

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

tests/effort-surface-axis.test.cjs

@@ -388,11 +388,6 @@ describe('#2481 — ADR-443 mechanism callers, as they actually exist', () => {
 });
 
 describe('#2481 review workflow resolves effort per reviewer', () => {
-  const reviewMd = fs.readFileSync(
-    path.join(REPO_ROOT, 'gsd-core', 'workflows', 'review.md'),
-    'utf8',
-  );
-
   test('shipped orchestration invokes resolve-execution — the grep ADR-443 said returned zero hits', () => {
     // Phase 5b (#2799) moved the call out of review.md's per-lane bash and into the review-lane
     // route, which resolves effort once per selected lane through the SAME surface. ADR-443's