get_run_stats now requires project; sandbox headers merged case-insensitively

What's Changed

• js: only check min backend version on stainless resource access by @KiewanVillatel in https://github.com/langchain-ai/langsmith-sdk/pull/3245
• fix(py): merge sandbox request headers case-insensitively by @ramon-langchain in https://github.com/langchain-ai/langsmith-sdk/pull/3244
• ci(py): remove test_feedback_formula_crud_flow integration test after endpoint deprecation by @KiewanVillatel in https://github.com/langchain-ai/langsmith-sdk/pull/3251
• feat: require project in get_run_stats / getRunStats by @KiewanVillatel in https://github.com/langchain-ai/langsmith-sdk/pull/3250
• fix: add session_id and start_time to feedback generated from evaluat… by @agola11 in https://github.com/langchain-ai/langsmith-sdk/pull/3249
• release(py): Bump version: 0.10.9 → 0.10.10 by @jacoblee93 in https://github.com/langchain-ai/langsmith-sdk/pull/3258

Full Changelog: https://github.com/langchain-ai/langsmith-sdk/compare/v0.10.9...v0.10.10