- Fix run_conversation sync/async boundary in 5 files:
  - run_agent.py main(): use _run_conversation_sync
  - batch_runner.py: use _run_conversation_sync
  - background_review.py: use _run_conversation_sync
  - curator.py: use _run_conversation_sync
  - acp_adapter/server.py: use _run_conversation_sync
- Fix classic Python closure late-binding bug in get_tools.py
  (is_async captured by reference, not value)
- Add missing deps to requirements.txt: openai, langchain-core, pyyaml, fire
- Fix missing HTTPException import in environment_config.py
- Fix missing List import in org_chart_svg.py