Run ui-app E2E tests upon deployment

.github/workflows/vercel-deployment.yml

@@ -0,0 +1,22 @@
+name: 'Vercel: E2E'
+
+on:
+  deployment_status:
+
+jobs:
+  ui-app:
+    if: github.event_name == 'deployment_status' && github.event.deployment_status.state == 'success' && github.event.deployment_status.environment == 'Production – ui-app'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: extractions/setup-just@v1
+      - uses: oven-sh/setup-bun@v1
+
+      - name: Install dependencies and setup Playwright
+        run: just setup deployment
+
+      - name: End-to-end tests
+        working-directory: ./deployment
+        env:
+          UI_APP_E2E_URL: ${{ github.event.deployment_status.url }}
+        run: just e2e deployment ui-app