add parameter for numerical stability in conditional entropy

[MUCDK]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (126672f) 78.38% compared to head (f4346b1) 78.38%.
Report is 13 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #658   +/-   ##
=======================================
  Coverage   78.38%   78.38%           
=======================================
  Files          36       36           
  Lines        3798     3798           
  Branches      702      702           
=======================================
  Hits         2977     2977           
  Misses        517      517           
  Partials      304      304           

Files	Coverage Δ
src/moscot/base/problems/_mixins.py	84.95% <100.00%> (ø)
src/moscot/base/problems/_utils.py	63.69% <100.00%> (ø)

... and 1 file with indirect coverage changes