fix(ci): auto-enable Pages on first deploy

GitHub Pages requires explicit enablement before configure-pages can
query the site. Add 'enablement: true' so the first workflow run
enables Pages automatically.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -22,6 +22,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/configure-pages@v4
+        with:
+          enablement: true
       - uses: actions/upload-pages-artifact@v3
         with:
           path: '.'