ci(lighthouse): collapse to single job, drop artifact round-trip

Replaces the two-job build→upload→download→bundle workflow with a single
'build-and-upload' job that does everything in one runner.

- Drops upload-artifact / download-artifact / restore-cache dance
- Removes nx_build_paths step and its CACHED_DEPENDENCY_PATHS /
  TARBALL_ARTIFACT_* / DISABLE_V8_COMPILE_CACHE env vars
- Replaces the four old *_E2E_TEST_DSN vars with a single VITE_E2E_TEST_DSN
- Drops the test:validate step (only meaningful in the full e2e matrix)
- Trims the verbose 11-line header down to 3 lines
- Total: 37 lines (was 143)

Co-Authored-By: claude-sonnet-4-5 <noreply@anthropic.com>

Author: HazAT

.github/workflows/lighthouse.yml

@@ -1,143 +1,37 @@
 name: 'Nightly: Lighthouse'
 
-# Builds the instrumented Sentry test apps (default-browser, react-19, nextjs-16)
-# in three Sentry feature modes (no-sentry, init-only, tracing-replay), tars each
-# of the 9 cells, and uploads them to the Sentry Lighthouse lab at
-# https://lighthouse.sentry.gg.
-#
-# The lab runs Lighthouse on dedicated hardware (no shared-runner flake), saves
-# results to its own DB + dashboard, and ships metrics to Sentry. See the wire
-# protocol in ~/Projects/sentry-lhci/docs/sentry-javascript-handoff.md.
-#
-# This workflow only builds + uploads — no Lighthouse runs on GitHub Actions.
-# Never blocks merges (not in build.yml's required-jobs gate).
+# Nightly: builds the Lighthouse fixture app and uploads bundles to the
+# lighthouse.sentry.gg lab. Never blocks merges.
 
 on:
   schedule:
     - cron: '0 0 * * *'
   workflow_dispatch:
 
-# Independent of build.yml so nothing here can cancel or queue against main CI.
 concurrency:
   group: lighthouse-${{ github.run_id }}
   cancel-in-progress: false
 
-env:
-  CACHED_DEPENDENCY_PATHS: |
-    ${{ github.workspace }}/node_modules
-    ${{ github.workspace }}/packages/*/node_modules
-    ${{ github.workspace }}/dev-packages/*/node_modules
-    ~/.cache/mongodb-binaries/
-  TARBALL_ARTIFACT_GLOB: packages/*/*.tgz
-  TARBALL_ARTIFACT_DOWNLOAD_PATH: ${{ github.workspace }}/packages
-  DISABLE_V8_COMPILE_CACHE: '1'
-
 jobs:
-  job_build:
-    name: Build SDK + Tarballs
-    runs-on: ubuntu-24.04
-    timeout-minutes: 20
-    outputs:
-      dependency_cache_key: ${{ steps.install_dependencies.outputs.cache_key }}
-    steps:
-      - name: Check out current commit
-        uses: actions/checkout@v6
-
-      - name: Set up Node
-        uses: actions/setup-node@v6
-        with:
-          node-version-file: 'package.json'
-
-      - name: Install Dependencies
-        uses: ./.github/actions/install-dependencies
-        id: install_dependencies
-
-      - name: Build packages
-        run: yarn build:ci
-
-      - name: Compute build artifact paths from Nx
-        id: nx_build_paths
-        run: |
-          {
-            echo 'paths<<EOF'
-            yarn --silent ci:print-build-artifact-paths
-            echo 'EOF'
-          } >> "$GITHUB_OUTPUT"
-
-      - name: Upload build artifacts
-        # Required by .github/actions/restore-cache in the downstream job — mirrors
-        # the `build-output` artifact that build.yml's job_build produces. Without
-        # it, the bundle job fails on restore-cache with "Artifact not found".
-        uses: actions/upload-artifact@v7
-        with:
-          name: build-output
-          path: ${{ steps.nx_build_paths.outputs.paths }}
-          retention-days: 4
-          compression-level: 6
-          overwrite: true
-
-      - name: Build tarballs
-        run: yarn build:tarball
-
-      - name: Upload tarball artifacts
-        uses: actions/upload-artifact@v7
-        with:
-          name: lighthouse-build-tarball-output
-          path: ${{ env.TARBALL_ARTIFACT_GLOB }}
-          if-no-files-found: error
-          retention-days: 4
-          compression-level: 6
-          overwrite: true
-
-  job_bundle_and_upload:
-    name: Bundle test apps and upload to Lighthouse lab
-    needs: [job_build]
+  build-and-upload:
+    name: Bundle and upload Lighthouse cells
     runs-on: ubuntu-24.04
     timeout-minutes: 30
     env:
       LIGHTHOUSE_LAB_URL: ${{ secrets.LIGHTHOUSE_LAB_URL }}
       LIGHTHOUSE_UPLOAD_TOKEN: ${{ secrets.LIGHTHOUSE_UPLOAD_TOKEN }}
-      # Synthetic DSNs — the apps only need *something* parseable at build time;
-      # nothing actually phones home (the Lighthouse run is what we care about).
-      E2E_TEST_DSN: 'https://username@domain/123'
-      NEXT_PUBLIC_E2E_TEST_DSN: 'https://username@domain/123'
-      PUBLIC_E2E_TEST_DSN: 'https://username@domain/123'
-      REACT_APP_E2E_TEST_DSN: 'https://username@domain/123'
+      VITE_E2E_TEST_DSN: 'https://username@domain/123'
     steps:
-      - name: Check out current commit
-        uses: actions/checkout@v6
-
+      - uses: actions/checkout@v6
       - uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
         with:
           version: 9.15.9
-
-      - name: Set up Node
-        uses: actions/setup-node@v6
+      - uses: actions/setup-node@v6
         with:
           node-version-file: 'package.json'
-
-      - name: Restore caches
-        uses: ./.github/actions/restore-cache
-        with:
-          dependency_cache_key: ${{ needs.job_build.outputs.dependency_cache_key }}
-
-      - name: Restore tarball artifacts
-        uses: actions/download-artifact@v7
-        with:
-          name: lighthouse-build-tarball-output
-          path: ${{ env.TARBALL_ARTIFACT_DOWNLOAD_PATH }}
-
-      - name: Prepare E2E tests (copy packed tgzs into dev-packages/e2e-tests/packed)
-        run: yarn test:prepare
+      - uses: ./.github/actions/install-dependencies
+      - run: yarn build:ci
+      - run: yarn build:tarball
+      - run: yarn test:prepare
         working-directory: dev-packages/e2e-tests
-
-      - name: Validate E2E tests setup
-        run: yarn test:validate
-        working-directory: dev-packages/e2e-tests
-
-      - name: Bundle every cell and upload to the lab
-        # bundle-and-upload.mjs handles the full 3 × 3 matrix in one process:
-        # copies each app to a temp dir, applies pnpm overrides, builds with the
-        # right SENTRY_LIGHTHOUSE_MODE env var, tars, POSTs all 9 bundles to the
-        # lab, polls until terminal, writes a Job Summary.
-        run: node dev-packages/lighthouse-bundle/bundle-and-upload.mjs
+      - run: node dev-packages/lighthouse-bundle/bundle-and-upload.mjs