What's Changed
* feat(js): Use new multipart endpoint when available by jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/1106
* chore(js): Release 0.1.67 by jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/1119
* fix(js): Limit queue batch concurrency, bump timeout, add maximum wait period for serverless envs by jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/1124
* feat(vercel): add OTEL based LangSmith trace exporter by dqbd in https://github.com/langchain-ai/langsmith-sdk/pull/1104
* factor out background and serde by efriis in https://github.com/langchain-ai/langsmith-sdk/pull/1130
* integration tests multipart by efriis in https://github.com/langchain-ai/langsmith-sdk/pull/1118
* properly setup env for tests by efriis in https://github.com/langchain-ai/langsmith-sdk/pull/1131
* fix(js): Further reduce blocking behavior, try naive stringification instead of circular detection by jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/1133
* fix(js): Remove focused test, fix tests by jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/1138
* fix: add required basic auth environment variable by bvs-langchain in https://github.com/langchain-ai/langsmith-sdk/pull/1128
* feat(py): Add multipart feedback ingestion by akira in https://github.com/langchain-ai/langsmith-sdk/pull/1129
New Contributors
* akira made their first contribution in https://github.com/langchain-ai/langsmith-sdk/pull/1129
**Full Changelog**: https://github.com/langchain-ai/langsmith-sdk/compare/v0.1.137...v0.1.138rc1