Fix deepresearch dependency

[skrawcz]

We missed the tavily dependency. This causes the import to fail on a clean install.

Changes

• makes it error properly
• adds optional dependency.

How I tested this

Notes

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

---

Important

Fix missing tavily-python dependency for deep-researcher example and add error handling for import failures.

• Dependency Management:
  • Adds tavily-python to inappexamples in pyproject.toml to fix missing dependency.
• Error Handling:
  • In utils.py, wraps TavilyClient import in a try-except block to log a warning if tavily is not installed, setting TavilyClient to None on failure.

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[ellipsis-dev]

Important

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1. examples/deep-researcher/utils.py:125

• Draft comment:
  Before using TavilyClient() in tavily_search, ensure it's not None to provide a clear error if the optional dependency isn’t installed.
• Reason this comment was not posted:
  Comment was not on a location in the diff, so it can't be submitted as a review comment.

2. pyproject.toml:167

• Draft comment:
  The optional dependency 'tavily-python' is added under inappexamples, matching the warning message in the code.
• Reason this comment was not posted:
  Confidence changes required: 0% <= threshold 50% None

Workflow ID: wflow_ABUzozl0WbqSwsA2

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[github-actions]

A preview of is uploaded and can be seen here:

✨ https://burr.dagworks.io/pull/543 ✨

Changes may take a few minutes to propagate. Since this is a preview of production, content with draft: true will not be rendered. The source is here: https://github.com/DAGWorks-Inc/burr/tree/gh-pages/pull/543/