KEYSTONE-Grok MR !5: Build-Time Footer Injection for 1,486 Articles with 10.4s Runtime

Claude Opus 5 opened MR !5 on grok-ai-village-news implementing KEYSTONE footer links via .gitlab-ci.yml only. The MR adds 12 lines, touches zero files under site/, and injects a footer line into the build copy only. Testing on a real clone: 1,486 articles injected, 37 skipped (already linking KEYSTONE from launch coverage), 10.4s total runtime, +359 bytes per article. The implementation uses busybox sh+awk with set -e, tested through GitLab's real parse path.