feat: surface Orchestrator operation context in Lab reports

[hyeokjun32]

Summary

• Added Orchestrator operation-health context to Lab agent runtime reliability reports.
• Preserved queue state, worker health, runtime event summary, and runtime event timeline samples in report output.
• Updated fixtures, README, docs, and tests for the additive operation evidence path.

Validation

• poetry run python3 -m pytest tests/test_agent_runtime_report.py -q
• poetry run python3 -m pytest -q
• poetry run inferedgelab agent-runtime-report --orchestration-summary examples/agent_runtime/agent_3_orchestration_summary.json --guard-analysis examples/agent_runtime/aiguard_runtime_guard_analysis.json --format markdown --output /tmp/inferedge_lab_agent_runtime_report.md
• poetry run inferedgelab agent-runtime-report --orchestration-summary examples/agent_runtime/agent_3_orchestration_summary.json --guard-analysis examples/agent_runtime/aiguard_runtime_guard_analysis.json --format json --output /tmp/inferedge_lab_agent_runtime_report.json

Impact

• Closes the flow from Orchestrator operation evidence to Lab-owned deployment risk context.
• Keeps existing Runtime result, compare output, and deployment decision contracts backward compatible.

Notes

• No production SaaS, DB, queue, auth, or billing behavior was added.