## Summary
- Adds `stream_mode`, `stream_subgraphs`, `stream_resumable`, and
`durability` parameters to cron `create`, `create_for_thread`, and
`update` methods in both async and sync clients
- Adds corresponding fields to the `CronUpdate` TypedDict in `schema.py`
- Adds `checkpoint_during` deprecation warnings to cron create methods
(consistent with the runs client pattern)
These fields were added to the OpenAPI spec in langgraph-api but were
not yet reflected in the Python SDK.
## Test plan
- [x] `make format` passes
- [x] `make lint` passes
- [x] `make test` passes (69/69, including sync/async API parity test)
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Additional guidelines:
- Make sure optional dependencies are imported within a function.
- Please do not add dependencies to `pyproject.toml` files (even
optional ones) unless they are **required** for unit tests.
- Most PRs should not touch more than one package.
- Changes should be backwards compatible.
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
