Lint and format with Ruff

[pgiraud]

trafficstars

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.61%. Comparing base (5c45afe) to head (7f16016).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #149   +/-   ##
=======================================
  Coverage   97.61%   97.61%           
=======================================
  Files          10       10           
  Lines        1214     1214           
=======================================
  Hits         1185     1185           
  Misses         29       29           

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[dlax]

Let's rather hold this on until we finish other planned or in-progress refactorings.