test: review-army + adversarial test hardening

- Tripwire scans execFileSync too (ceiling 8: two more grep-needle string
  exemptions); merge-introduced timeout-less spawnSync in
  question-preference-hook fixed — the tripwire caught a site that landed
  on main AFTER the sweep, on its first day.
- gstack-detach gains TWO watchdog kill regression tests: TERM-immune
  grandchild (the killpg-after-grace escalation) and the leader-dies
  variant (the pgid-at-spawn fix — the case the first test cannot see).
- eval-flake-rank gets its unit suite (final-attempt accounting, artifact
  exclusion, shard recursion, recency bound).
- Groupkill/startup-grace shim markers are per-run unique (pid-suffixed
  sleep durations): sibling Conductor worktrees run free suites with no
  machine lock, and fixed markers let one run pgrep/pkill the other's
  shims — a cross-run flake inside the anti-flake tests.
- flake-ledger test pins the project-scoped local default; stale empty
  section headers in touchfiles-data deleted (they invited entries under
  deliberately retired categories).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/helpers/touchfiles-data.ts

@@ -229,8 +229,6 @@ export const E2E_TOUCHFILES: Record<string, string[]> = {
   'retro':             ['bin/gstack-retro-metrics', 'retro/**', 'test/skill-e2e-retro.test.ts'],
   'retro-base-branch': ['bin/gstack-retro-metrics', 'retro/**', 'test/skill-e2e-retro.test.ts'],
 
-  // Global discover
-
   // CSO
   'cso-full-audit':   ['cso/**', 'test/skill-e2e-cso.test.ts'],
   'cso-diff-mode':    ['cso/**', 'test/skill-e2e-cso.test.ts'],
@@ -297,8 +295,6 @@ export const E2E_TOUCHFILES: Record<string, string[]> = {
     'test/skill-e2e-docsync-spawned.test.ts',
   ],
 
-  // Plan completion audit + verification
-
   // Design
   'design-consultation-core':       ['design-consultation/**', 'scripts/gen-skill-docs.ts', 'test/helpers/llm-judge.ts', 'test/skill-e2e-design.test.ts'],
   'design-consultation-existing':   ['design-consultation/**', 'scripts/gen-skill-docs.ts', 'test/skill-e2e-design.test.ts'],
@@ -307,8 +303,6 @@ export const E2E_TOUCHFILES: Record<string, string[]> = {
   'plan-design-review-no-ui-scope': ['plan-design-review/**', 'scripts/gen-skill-docs.ts', 'test/skill-e2e-design.test.ts'],
   'design-review-fix':              ['design-review/**', 'browse/src/**', 'scripts/gen-skill-docs.ts', 'test/skill-e2e-design.test.ts'],
 
-  // Design Shotgun
-
   // /diagram (diagram-render bundle consumers). Triplet = deterministic
   // functional (gate); authoring quality = LLM-judged benchmark (periodic).
   'diagram-triplet':            ['diagram/**', 'lib/diagram-render/**', 'browse/src/write-commands.ts', 'browse/src/read-commands.ts', 'test/skill-e2e-diagram.test.ts'],
@@ -696,8 +690,6 @@ export const E2E_TIERS: Record<string, 'gate' | 'periodic'> = {
   'retro': 'periodic',
   'retro-base-branch': 'gate',
 
-  // Global discover
-
   // CSO — gate for security guardrails, periodic for quality
   'cso-full-audit': 'periodic',  // D2a demotion 2026-08: 250s/$0.57 full audit; cso targeted tests stay gate
   'cso-diff-mode': 'gate',
@@ -827,8 +819,6 @@ export const LLM_JUDGE_TOUCHFILES: Record<string, string[]> = {
   'design-review/SKILL.md fix loop':      ['design-review/SKILL.md', 'design-review/SKILL.md.tmpl', 'test/skill-llm-eval.test.ts'],
   'design-consultation/SKILL.md research': ['design-consultation/SKILL.md', 'design-consultation/SKILL.md.tmpl', 'test/skill-llm-eval.test.ts'],
 
-  // Office Hours
-
   // Deploy skills
   'land-and-deploy/SKILL.md workflow':    ['land-and-deploy/SKILL.md', 'land-and-deploy/SKILL.md.tmpl', 'land-and-deploy/sections/**', 'test/skill-llm-eval.test.ts'],
   'canary/SKILL.md monitoring loop':      ['canary/SKILL.md', 'canary/SKILL.md.tmpl', 'test/skill-llm-eval.test.ts'],