Strands tracing improved for thinking and tool results

What's Changed

• fix(python): exclude internal signing env vars from trace metadata by @saad-supports-langchain in https://github.com/langchain-ai/langsmith-sdk/pull/3235
• feat(py/strands): improved tracing of thinking and tool result blocks from Strands by @jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/3236
• release(py): Bump version: 0.10.8 → 0.10.9 by @jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/3237

New Contributors

• @saad-supports-langchain made their first contribution in https://github.com/langchain-ai/langsmith-sdk/pull/3235

Full Changelog: https://github.com/langchain-ai/langsmith-sdk/compare/v0.10.8...v0.10.9