Update notebooks

[alicjapolanska]

Update legacy notebooks to use new imports.

Only install packages if on colab.

Update cross validation utils to only log log space values.

[Kiyam]

Great

[Copilot]

Pull Request Overview

This PR updates legacy notebooks to modernize their structure and improve Colab compatibility. The key changes include conditionally installing packages only when running on Google Colab, updating import statements to use the new harmonic.utils module path, and modifying the cross-validation utility function to log values in log space rather than linear space.

Key Changes

• Conditional package installation that only runs on Google Colab environments
• Import path updates from import utils to import harmonic.utils as utils
• Model class references updated from hm.model.* to hm.model_legacy.*
• Cross-validation logging modified to output log-space values instead of linear-space values

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 4 comments.

File	Description
notebooks/cross_validation_learnt_model.ipynb	Updated to conditionally install packages on Colab, changed imports to use harmonic.utils, and updated model references to model_legacy
notebooks/cross_validation_hyper_parameters.ipynb	Same updates as learnt_model notebook, plus a misplaced %%capture magic command within an if statement
notebooks/checkpointing.ipynb	Updated with conditional Colab installation check
harmonic/utils.py	Modified cross-validation logging to output log-space values using np.exp() and corrected variance calculations

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.13%. Comparing base (2eeccd7) to head (1e49d03).
⚠️ Report is 12 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #323   +/-   ##
=======================================
  Coverage   94.13%   94.13%           
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  Files          10       10           
  Lines         802      802           
=======================================
  Hits          755      755           
  Misses         47       47           

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