fix(build): bump protobuf package version to a compatible version

[federicobond]

This should fix the build errors in the immediate, but I haven't done more research on what a better constraint should be for long-term reliability.

[gemini-code-assist]

Summary of Changes

Hello @federicobond, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request aims to fix existing build errors by updating the protobuf dependency to a more recent and compatible version. The change specifically targets the openfeature-provider-flagd component, ensuring that the build process can complete successfully with the updated dependency.

Highlights

• Protobuf Version Bump: The protobuf package version has been updated from 5.26.1 to 5.29.5 across the project's dependency configurations to resolve build errors.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.56%. Comparing base (97a5717) to head (061ed36).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #327   +/-   ##
=======================================
  Coverage   94.56%   94.56%           
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  Files          22       22           
  Lines        1068     1068           
=======================================
  Hits         1010     1010           
  Misses         58       58           

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[gemini-code-assist]

Code Review

This pull request updates the protobuf dependency to version 5.29.5 to fix build errors. The changes are correctly applied to pyproject.toml for the openfeature-provider-flagd provider and the uv.lock file. My review includes a suggestion to improve the dependency specification for protobuf to enhance stability for downstream users by using a compatible release specifier, which will prevent potential issues with future releases.

[gruebel]

I have another PR open to support Python 3.14, which needs to bump protobuf even higher. So, let's go with this for now.

[federicobond]

Ah sorry, must have missed that. Will review yours after this merge.