Report AIGuard worker health trend evidence

[hyeokjun32]

Summary

• surface AIGuard worker-health trend evidence in Lab Runtime Intelligence reports
• align Runtime Intelligence chain fixtures, manifest gates, artifact gates, and docs with the new evidence type
• validate EdgeEnv handoff summary preserves Orchestrator worker_health_trend run IDs while Lab remains the final decision owner

Tests

• python -m pytest tests/test_runtime_intelligence_evidence_chain_smoke.py -q
• python -m pytest tests/test_runtime_intelligence_bundle_manifest.py -q
• python -m pytest tests/test_report_generators.py -q
• bash scripts/smoke_runtime_intelligence_chain.sh --output-dir /tmp/lab_worker_health_trend_smoke
• python -m pytest -q
• git diff --check