Update Missing Values Handling

[nikml]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 63.71528% with 418 lines in your changes are missing coverage. Please review.

Project coverage is 76.48%. Comparing base (9f09409) to head (f30e875).

Files	Patch %	Lines
...performance_estimation/confidence_based/metrics.py	61.46%	167 Missing and 85 partials ⚠️
...e_calculation/metrics/multiclass_classification.py	60.13%	36 Missing and 21 partials ⚠️
...nyml/performance_calculation/metrics/regression.py	44.18%	30 Missing and 18 partials ⚠️
...mance_estimation/direct_loss_estimation/metrics.py	59.25%	15 Missing and 18 partials ⚠️
...mance_calculation/metrics/binary_classification.py	87.34%	11 Missing and 10 partials ⚠️
...ml/performance_estimation/confidence_based/cbpe.py	16.66%	2 Missing and 3 partials ⚠️
nannyml/base.py	75.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #378      +/-   ##
==========================================
- Coverage   78.60%   76.48%   -2.12%     
==========================================
  Files         110      110              
  Lines        8567     9221     +654     
  Branches     1519     1650     +131     
==========================================
+ Hits         6734     7053     +319     
- Misses       1474     1701     +227     
- Partials      359      467     +108     

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