Automated update of translated documentation.

Triggered by commit: a776d809d3f4dfe267f857b66510ec12b3fff923.
Message: `Nest handoff history by default (#1996)

Summary

• add a nest_handoff_history flag to RunConfig and call a new helper
  that condenses the prior transcript into a developer-role summary when
  handing off
• update the default handoff path, docs, and helper library so that the
  developer summary is produced automatically unless a custom filter
  overrides it
• expand the handoff-focused tests to cover the new behavior (including
  helper unit tests) and update existing expectations

Testing

• uv run pytest tests/test_extension_filters.py
• uv run pytest tests/test_agent_runner.py -k handoff
• uv run pytest tests/test_agent_runner_streamed.py -k handoff

https://chatgpt.com/codex/tasks/task_i_68ff73bda0f4832496f3d1fa9103905f`