Sandbox sizing via vcpus/mem_bytes; JS Dockerfile snapshots

What's Changed

• feat(sandbox): add JS Dockerfile snapshots by @langchain-infra in https://github.com/langchain-ai/langsmith-sdk/pull/2951
• chore(deps-dev): bump the js-minor-and-patch group across 1 directory with 11 updates by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2931
• chore(deps): bump websockets from 15.0.1 to 16.0 in /python by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2811
• chore(deps): update myst-parser requirement from >=3 to >=4.0.1 in /python by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2841
• chore(deps): bump the py-minor-and-patch group across 1 directory with 19 updates by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2934
• chore(deps): bump typescript from 5.9.3 to 6.0.3 in /js by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2839
• chore(deps-dev): bump google-adk from 1.10.0 to 2.1.0 in /python by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2960
• chore(deps-dev): bump wrapt from 1.17.3 to 2.2.1 in /python by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2961
• chore(deps-dev): bump the py-minor-and-patch group in /python with 6 updates by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2958
• chore(deps-dev): bump types-tqdm from 4.67.3.20260408 to 4.67.3.20260518 in /python by @dependabot[bot] in https://github.com/langchain-ai/langsmith-sdk/pull/2959
• ci: add minimum workflow permissions by @jkennedyvz in https://github.com/langchain-ai/langsmith-sdk/pull/2967
• chore: update dependabot.yml to comply with posture checks by @jkennedyvz in https://github.com/langchain-ai/langsmith-sdk/pull/2966
• test(python): deflake test_tracing_queue_limit_drops_when_full by @baskaryan in https://github.com/langchain-ai/langsmith-sdk/pull/2964
• feat(sandbox): size the dockerfile-build sandbox via vcpus/mem_bytes (python) by @langchain-infra in https://github.com/langchain-ai/langsmith-sdk/pull/2979

Full Changelog: https://github.com/langchain-ai/langsmith-sdk/compare/v0.8.8...v0.8.9