Update featurizer

[naik-aakash]

Changes

• Include charge statistics (min, mean, max, std) in DataFrame returned by ChargeFeaturier
• Adapt and update tests to reflect the changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.79%. Comparing base (c2fc69f) to head (0b00510).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #420   +/-   ##
=======================================
  Coverage   96.79%   96.79%           
=======================================
  Files          10       10           
  Lines        3303     3306    +3     
=======================================
+ Hits         3197     3200    +3     
  Misses        106      106           

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