Harmonic model return residuals

[veni-vidi-vici-dormivi]

• Closes Harmonic model testing #459
• Tests added

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.79%. Comparing base (9b0b76b) to head (b9efe99).
Report is 90 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #460      +/-   ##
==========================================
+ Coverage   87.90%   88.79%   +0.88%     
==========================================
  Files          40       43       +3     
  Lines        1745     1883     +138     
==========================================
+ Hits         1534     1672     +138     
  Misses        211      211              

Flag	Coverage Δ
unittests	88.79% <100.00%> (+0.88%)	⬆️

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[mathause]

Do you know if the tests are faster because they abort earlier or because the fitting is genuinely faster?

[veni-vidi-vici-dormivi]

Do you know if the tests are faster because they abort earlier or because the fitting is genuinely faster?

Should be because they are generally faster because also before they aborted at low orders (for few time steps).

[mathause]

Yes you are right it seems to be both 🍾

[mathause]

This brings down the time of the tests by 30 s (1/3) - another nice win 🥇