ci: filter e2e workflow on PRs to skip unrelated changes (#11568)

## Summary

Skip the main e2e test suite on PRs that only touch unrelated paths
(website, docs, storybook, markdown).

## Changes

- **What**: Replace the broad `paths-ignore: ['**/*.md']` on the
`pull_request` trigger with a more targeted `paths-ignore` list covering
`apps/**`, `docs/**`, `**/*.md`, and `.storybook/**`. The `push` (to
main), `merge_group`, and `workflow_dispatch` triggers remain
unconditional.

## Review Focus

- The `merge_group` trigger has no path filter, so the merge queue
always runs e2e as a safety net before merge.
- Using `paths-ignore` (denylist) rather than `paths` (allowlist) so new
top-level directories trigger e2e by default.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-11568-ci-filter-e2e-workflow-on-PRs-to-skip-unrelated-changes-34b6d73d365081ea8603ef94bc86b6e6)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Amp <amp@ampcode.com>

.github/workflows/ci-tests-e2e-forks.yaml

@@ -51,15 +51,16 @@ jobs:
 
       - name: Download and Deploy Reports
         if: steps.pr.outputs.skip != 'true' && github.event.action == 'completed'
-        uses: actions/download-artifact@v7
+        uses: dawidd6/action-download-artifact@0bd50d53a6d7fb5cb921e607957e9cc12b4ce392 # v12
         with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          run-id: ${{ github.event.workflow_run.id }}
-          pattern: playwright-report-*
+          run_id: ${{ github.event.workflow_run.id }}
+          name: playwright-report-.*
+          name_is_regexp: true
           path: reports
+          if_no_artifact_found: warn
 
       - name: Handle Test Completion
-        if: steps.pr.outputs.skip != 'true' && github.event.action == 'completed'
+        if: steps.pr.outputs.skip != 'true' && github.event.action == 'completed' && hashFiles('reports/**') != ''
         env:
           CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}