Tests: persistence tripwire + cue resolution + audit/gate hardening, group 3 (review Phase 2)

- Profile persistence TRIPWIRE: reflection over every public writable Profile field -
  each must round-trip ApplyProfile->CopyTo or appear on an explicit declared list
  (control-owned or legacy, each with its reason). Add a field without wiring it and
  this FAILS naming the field - closing the three-parallel-lists drift trap for good.
  The declared list is itself checked against real properties so it can't rot.
  (Immediately proved itself: enumerated the 14 legacy v4.4 hotkey fields.)
- Cue variant resolution: 'Sound N' labels, numeric ordering, the drop-bare-when-
  numbered dedupe (the duplicate-row NVDA trap), chosen-default honoured + fallback
  when the chosen file is gone.
- Accessibility audit now includes UpdateInstallNoticeDialog (it was the one
  Form-derived dialog missing from the audit list).
- Skipped self-test steps are now LOUD: the summary names every skipped step and
  run-tests.ps1 prints a yellow warning - a gate pass with steps skipped no longer
  reads as full coverage.

Gate 58/58.

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

run-tests.ps1

@@ -122,6 +122,15 @@ foreach ($line in ($st.Text -split "`r?`n")) {
     if ($line -match '\[(PASS|FAIL|SKIP)\]|^RESULT:') { Write-Host "  $($line.Trim())" }
 }
 if ($st.Code -eq 0) { Pass "self-test passed (exit 0)" } else { Fail "self-test failed (exit $($st.Code))" }
+# Skipped steps are coverage that did NOT run. The gate still passes (some skips are legitimate on a
+# headless/agent box), but they must be impossible to miss in the output - a release verified with
+# steps skipped is only as verified as what actually ran.
+$skipLine = ($st.Text -split "`r?`n") | Where-Object { $_ -match '^SKIPPED STEPS' } | Select-Object -First 1
+if ($skipLine) {
+    Write-Host ""
+    Write-Host "  WARNING: $($skipLine.Trim())" -ForegroundColor Yellow
+    Write-Host "  These steps did not run on this machine - their coverage is NOT verified." -ForegroundColor Yellow
+}
 
 Write-Host "`nResource sanity (handle/memory leak check):" -ForegroundColor Cyan
 $pf = Invoke-RsCli @('--perftest', '--seconds', '12')