Record Gate A2 browser driver version

Author: fraware

.github/workflows/gate-a2-browser-e2e.yml

@@ -59,6 +59,7 @@ jobs:
           cd "${RUNNER_TEMP}/gate-a2-e2e"
           npm init -y >/dev/null
           npm install --no-save --package-lock=false puppeteer-core@24.31.0
+          node -e "const p=require('puppeteer-core/package.json'); if(p.version!=='24.31.0') process.exit(1); console.log('browser-driver-version='+p.version)"
       - name: Collect five qualified attempts and verify release provenance
         run: |
           set -euo pipefail