Add missing dependency for nvidia-nat-opentelemetry to nvidia-nat-langchain

[dagardner-nv]

Description

• The langsmith integration in nvidia-nat-langchain requires code in nvidia-nat-opentelemetry
• Update examples/notebooks documentation to explicitly choose a supported version of Python (unrelated drive-by fix).

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Summary by CodeRabbit

• Documentation

  • Updated Python environment setup instructions to specify Python 3.13.

• Chores

  • Added opentelemetry dependency to package configuration.

[coderabbitai]

Important

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Walkthrough

Documentation update specifying Python 3.13 for virtual environment setup and configuration of the nvidia-nat-opentelemetry dependency with local source mapping in the pyproject.toml file.

Changes

Cohort / File(s)	Summary
Documentation examples/notebooks/README.md	Updated Jupyter/Colab environment setup instructions to explicitly specify Python 3.13 version (-p 3.13) when creating virtual environment with uv venv.
Dependency Configuration packages/nvidia_nat_langchain/pyproject.toml	Added nvidia-nat-opentelemetry as a dynamic dependency and configured it as a local editable source pointing to the sibling nvidia_nat_opentelemetry package directory.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change (adding missing dependency) but exceeds the recommended ~72 character limit at 79 characters.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[Salonijain27]

Approved from a dependency point of view

[dagardner-nv]

/merge