## Summary
- The docs-sync warning notification was sending "see workflow run for
details" with no actionable information
- Now reads `review-items.txt` and includes the file list directly in
the Slack message
- Recipients can see which files need attention without digging through
CI logs
## Test plan
- [ ] Trigger docs-sync with a file that has showcase-local
modifications (exit code 3 path)
- [ ] Verify Slack notification includes the file list in a code block
- [ ] Verify auto-push-only path (exit code 0) still does NOT send the
warning notification
Jordan Ritter
f97bf875d9