Update config

[hugovk]

• Add seven-day cooldown to Renovate: https://blog.yossarian.net/2025/11/21/We-should-all-be-using-dependency-cooldowns
• No need for setup-python with prek-action
• Don't ignore UP038, it's been removed from Ruff

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.51%. Comparing base (3dca143) to head (bdc49ea).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #285   +/-   ##
=======================================
  Coverage   99.51%   99.51%           
=======================================
  Files          11       11           
  Lines         829      829           
=======================================
  Hits          825      825           
  Misses          4        4           

Flag	Coverage Δ
macos-latest	97.82% <ø> (ø)
ubuntu-latest	97.82% <ø> (ø)
windows-latest	95.89% <ø> (ø)

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