relay-eval dashboard: group by operator, rename classifications
- group relays by operator with colored symbols (matches pulsar's "run by")
- "real gaps" → "missed (active)" — factual, not vague
- "can't resolve" → "unresolvable", "inactive" → "deactivated"
- operator legend, breakdown sorted by most missed first
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>