fix(protobuf): pin major

[paul-nechifor]

Same as #1372 but to main

[greptile-apps]

Greptile Summary

This PR explicitly pins the protobuf dependency to major version 6 (>=6.33.5,<7), preventing automatic upgrades to the upcoming v7 which may contain breaking changes.

Changes:

• Added protobuf>=6.33.5,<7 to core dependencies in pyproject.toml
• Updated uv.lock with the explicit dependency

Context:

• protobuf is already a transitive dependency through packages like rerun-sdk, onnxruntime, and tensorboardx
• Making it explicit ensures version control and stability
• Aligns with existing types-protobuf>=6.32.1.20250918,<7 dev dependency
• No code changes required, purely dependency management

Confidence Score: 5/5

• This PR is safe to merge with no risk
• This is a defensive dependency management change that explicitly pins an already-used transitive dependency. Version 6.33.5 is already present in the lock file, and the major version constraint (<7) prevents breaking changes. No code changes, no logic changes, and aligns with existing type stub versioning.
• No files require special attention

Important Files Changed

Filename	Overview
pyproject.toml	Added explicit protobuf dependency with major version pin (>=6.33.5,<7) to prevent breaking changes from v7 upgrade
uv.lock	Lock file updated to reflect explicit protobuf dependency at version 6.33.5

_{Last reviewed commit: 532d4e8}

[greptile-apps]

_{2 files reviewed, no comments}

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[paul-nechifor]

Closed as I've already released the fix.