The webui release handoff verified org.opencontainers.image.revision on the
Harbor artifact's own extra_attrs.config.Labels. That works for a single-arch
image, but a multi-arch manifest list has no top-level config, so Harbor reports
the label on each per-arch child. build-38 built + published the index fine, then
failed post-publish with 'Harbor artifact omitted OCI image labels'.
verify_registry_digest now checks the top-level config labels when present
(single-arch, unchanged) and otherwise walks the index references, fetching each
child artifact by digest and asserting its revision label. Mirrors how the agent
image lane already tolerates a multi-arch index, without dropping the supply-chain
label check. Adds multi-arch pass/reject tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BvMSXH8VH2tMWXanb8SJdf
2c91aea01d