LAr AC classifier: changes to larveto.py

[rosannadeckert]

• split time term from amplitude term & added correct signs (minus for time term, plus for amplitude)
• made time pdf a true normalized pdf by adding (1-bkg_prob) factor in front of double exponential
• changed naming sing2trip_ratio -> sing2tot_ratio
• changed amplitude pdf to log pdf to mitigate numerical problems
• amplitude log pdf function uses user-provided pdf (and arg in the main function)
• review numerical stability
• allow for changing the probability of random pulses (and arg in the main function)
• filter pulses with a noise threshold suitable for the classifier (i.e. no afterpulses)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 21.38%. Comparing base (e7b7b36) to head (6a4ce89).
Report is 223 commits behind head on main.

❗ Current head 6a4ce89 differs from pull request most recent head be05b5f. Consider uploading reports for the commit be05b5f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #574      +/-   ##
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+ Coverage   21.34%   21.38%   +0.03%     
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  Files          42       42              
  Lines        7907     7907              
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+ Hits         1688     1691       +3     
+ Misses       6219     6216       -3     

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