Skip SBOM generation entirely since cve-edge-post.yml only needs
vulnerability counts, not CycloneDX artifacts — scan each image with
`trivy image` directly and aggregate with python3 (drop jq dependency).
Output is now a JSON array with one entry per image instead of a single
merged summary.
.github/workflows/sbom.yml 의 SBOM_PIPELINE_IMAGE 로 사용하는 실행 이미지
Dockerfile 을 doc/scripts/Dockerfile 로 추가(debian/glibc + helm/trivy/python3/git).
워크플로·sbom-pipeline.md 에서 상호 참조하도록 갱신.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>