Add scheduler delay telemetry sample

[hyeokjun32]

Summary

• add a curated scheduler-delay telemetry sample produced from the sustained high-load Orchestrator scenario
• document the downstream AIGuard scheduler_delay_pattern and Lab report expectation
• cover the sample contract in telemetry artifact tests

Tests

• PYTHONDONTWRITEBYTECODE=1 .venv/bin/python -m pytest tests/test_sample_telemetry_artifacts.py tests/test_runtime_telemetry.py tests/test_docs_links.py -q -p no:cacheprovider
• PYTHONDONTWRITEBYTECODE=1 .venv/bin/python -m pytest -q -p no:cacheprovider
• PYTHONDONTWRITEBYTECODE=1 PYTHONPATH=src .venv/bin/python -m inferedge_orchestrator run --config configs/agent_3_workload_sustained_high_load.json --output /tmp/inferedge_orchestrator_scheduler_delay_e2e_summary.json --frames 16
• PYTHONDONTWRITEBYTECODE=1 /opt/anaconda3/bin/python -m inferedge_aiguard.cli reason-orchestration --input /tmp/inferedge_orchestrator_scheduler_delay_e2e_summary.json --save-json /tmp/inferedge_orchestrator_scheduler_delay_aiguard.json --save-md /tmp/inferedge_orchestrator_scheduler_delay_aiguard.md
• poetry run inferedgelab agent-runtime-report --orchestration-summary /tmp/inferedge_orchestrator_scheduler_delay_e2e_summary.json --guard-analysis /tmp/inferedge_orchestrator_scheduler_delay_aiguard.json --format markdown --output /tmp/inferedge_orchestrator_scheduler_delay_lab_report.md