Refactor PCA

[nikml]

• refactor pca for speed and code quality improvements

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 78.59%. Comparing base (57d4148) to head (4fc6e79).

Files	Patch %	Lines
...ift/multivariate/data_reconstruction/calculator.py	89.47%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #385      +/-   ##
==========================================
- Coverage   78.67%   78.59%   -0.08%     
==========================================
  Files         110      110              
  Lines        8567     8565       -2     
  Branches     1523     1519       -4     
==========================================
- Hits         6740     6732       -8     
- Misses       1468     1474       +6     
  Partials      359      359              

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[nnansters]

Nice one buddy! 🏅