Add remote operation summary evidence

[hyeokjun32]

Summary

• add remote_operation_summary to remote dispatch results for compact operation evidence
• record a terminal runtime event for downstream registry/report ingestion
• update remote dispatch docs, telemetry sample, and tests

Tests

• PYTHONDONTWRITEBYTECODE=1 .venv/bin/python -m pytest tests/test_remote_dispatch.py tests/test_sample_telemetry_artifacts.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 remote-dispatch --registry examples/remote_worker_registry.json --request examples/remote_task_request.json --output /tmp/inferedge_orchestrator_remote_operation_summary_smoke.json