Pargen bug fixes

[ggmarshall]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 22.22222% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 50.09%. Comparing base (1f9f82f) to head (e1151c0).
Report is 6 commits behind head on main.

Files	Patch %	Lines
src/pygama/pargen/energy_cal.py	33.33%	4 Missing ⚠️
src/pygama/pargen/lq_cal.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #582      +/-   ##
==========================================
- Coverage   50.11%   50.09%   -0.03%     
==========================================
  Files          59       59              
  Lines        7766     7770       +4     
==========================================
  Hits         3892     3892              
- Misses       3874     3878       +4     

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