Add release approval gate

scripts/preview-pack-smoke.js

@@ -18,6 +18,7 @@ const REQUIRED_ARTIFACTS = [
   'docs/architecture/observability-readiness.md',
   'docs/architecture/progress-sync-contract.md',
   'scripts/preview-pack-smoke.js',
+  'scripts/release-approval-gate.js',
   `${RELEASE_DIR}/release-notes.md`,
   `${RELEASE_DIR}/quickstart.md`,
   `${RELEASE_DIR}/launch-checklist.md`,
@@ -47,6 +48,7 @@ const REQUIRED_VERIFICATION_COMMANDS = [
   'git status --short --branch',
   'node scripts/platform-audit.js --json',
   'npm run preview-pack:smoke',
+  'npm run release:approval-gate -- --format json',
   'npm run release:video-suite -- --format json',
   'npm run harness:adapters -- --check',
   'npm run harness:audit -- --format json',