Stability checkpoint — GitHub Actions backup CI (double-CI per ADR-0069) - feat(ci): backup build-test workflow via GitHub Actions (mvn verify + postgres service) - ✅ Main pipeline #2518082724 success - ✅ GH Actions run #25718233396 success (first live double-CI run) - ✅ Auto-merge dev→main fires on .github/** changes (workflow rules allowlist includes the path) - 🔄 CI/CD : Linux amd64 native backup gate via GH Actions (ubuntu-latest) - ✅ Qualité : independent failure domain from GitLab SaaS