Mirror AIGuard optional source traceability

[hyeokjun32]

Summary

• mirror the AIGuard optional stale-drop source artifact and regeneration command in EdgeEnv Lab handoff alignment metadata
• document the read-only source traceability in English, Korean, and portfolio docs
• assert the new optional source traceability block and docs markers in the Runtime Intelligence handoff tests

Tests

• python -m py_compile inferedge_env/result/lab_handoff.py tests/test_runtime_intelligence_lab_handoff.py
• git diff --check
• python -m pytest tests/test_runtime_intelligence_lab_handoff.py -q -p no:cacheprovider
• python -m pytest tests/test_runtime_telemetry_history.py -q -p no:cacheprovider
• python -m pytest -q -p no:cacheprovider