Review Python lint warnings

[marcusburghardt]

The PR #705 introduced ruff linter with the minimal coverage enabled, but with many commented checks to be gradually enabled while the warnings are reviewed and fixed, whenever necessary.

This issue is to track the code improvements and the gradual increasing coverage of linter checks.

[Agentx402]

Thanks for opening this issue to track the linting improvements! Gradually enabling ruff checks is a great approach to improving code quality without overwhelming the codebase all at once.

I'd suggest tackling the commented-out rules in logical groups (e.g., import-related rules first, then code complexity, then style conventions) and creating small PRs for each category. This makes reviews easier and helps the team build momentum. Good luck with the cleanup! 🚀