feat: add remote dispatch starter

[hyeokjun32]

Summary

• Added a file-based remote dispatch starter for Orchestrator.
• Added worker registry/task request examples and dispatch result contract docs.
• Kept the scope explicit: this is remote worker selection evidence, not production remote execution.

Validation

• PYTHONDONTWRITEBYTECODE=1 .venv/bin/python -m pytest tests/test_remote_dispatch.py tests/test_docs_links.py -q -p no:cacheprovider
• PYTHONDONTWRITEBYTECODE=1 .venv/bin/python -m pytest -q -p no:cacheprovider
• PYTHONPATH=src PYTHONDONTWRITEBYTECODE=1 .venv/bin/python -m inferedge_orchestrator remote-dispatch --registry examples/remote_worker_registry.json --request examples/remote_task_request.json --output reports/remote_dispatch_result.json
• git diff --check

Notes

• No production remote worker, SSH/HTTP dispatch, or Cloudflare behavior was added.
• AGENTS/Obsidian guidance was updated locally to keep the boundary clear.