v0.26.0

Changelog

• 1baed25 chore(release): v0.26.0 — PR quality gates, native hermes/opencode ingest, version-centric observability
• 75cda24 chore(skills): dogfood interface-design, hoist [registry] above [skills]
• a0ba42f ci: goreportcard-grade quality gates on every PR
• a43328e feat(metrics): version-centric skill aggregations — observed versions over verified counts
• 9c78190 feat(ops): native hermes/opencode ingest, load-path evidence, ingest-time identity snapshots
• 4c570e3 feat(ui): version pins across the dashboard, unknown as a quiet state
• 510ca80 fix(ci): restore internal/ui/dist/.gitkeep so go:embed compiles without a built bundle
• cee5a50 style: golint parity — package/doc comments, justified blank imports, internal unexports