WebSocket timeouts raised to 120s; connect failures now retry

What's Changed

• fix(sandbox): raise WebSocket open timeout to 120s by @ramon-langchain in https://github.com/langchain-ai/langsmith-sdk/pull/3280
• fix(sandbox): retry WebSocket connect failures instead of waiting longer by @ramon-langchain in https://github.com/langchain-ai/langsmith-sdk/pull/3282
• feat: migrate internal list_runs/read_run usages to SmithDB v2 API by @KiewanVillatel in https://github.com/langchain-ai/langsmith-sdk/pull/3262
• fix(sandbox): retry WebSocket connect failures in JS run() by @ramon-langchain in https://github.com/langchain-ai/langsmith-sdk/pull/3283
• release(py): 0.10.12 by @ramon-langchain in https://github.com/langchain-ai/langsmith-sdk/pull/3285

Full Changelog: https://github.com/langchain-ai/langsmith-sdk/compare/v0.10.11...v0.10.12