Adds the repo-ui-metadata extractor (ui_status yes/candidate/not_detected
plus ui_evidence), falls back to the legacy validator when jsonschema does
not accept a referencing registry, and covers unknown edge endpoints in the
graph explorer.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 7458@bnt-lap001
Assistant-Session: 62534cdf-8348-48a7-9c0d-46e0f74c8eae
