CVE-2025-64439 - Update to be compatible with langgraph-checkpoint 3.0

[scdozier]

Cannot update langgraph-checkpoint to be greater than 3.0 to fix CVE-2025-64439 due to pinned version

https://nvd.nist.gov/vuln/detail/CVE-2025-64439

CVE-2025-64439 - This CVE record has recently been published to the CVE List and has been included within the NVD dataset.DescriptionLangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In versions 2.1.2 and below, the JsonPlusSerializer (used as the default serialization protocol for all checkpointing) contains a Remote Code Execution (RCE) vulnerability when deserializing payloads saved in the "json" serialization mode. By default, the serializer attempts to use "msgpack" for serialization. However, prior to version 3.0 of the checkpointer library, if illegal Unicode surrogate values caused serialization to fail, it would fall back to using the "json" mode. This issue is fixed in version 3.0.0.

[scdozier]

looks like this is fixed with #259