Docker Scout requires buildx-style provenance+SBOM, not cosign
attestations. Replace crane push with docker load + buildx build
(--provenance=mode=max --sbom=true) for the installer image. Use
buildx imagetools create for the release tag to preserve attestations.
Remove cosign/syft from CI.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Move CI/CD, runner setup, secrets, and project structure to
TECHNICAL.md. Streamline README as a user-facing guide with
install/upgrade instructions. Fix Docker badges for arm64.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>