Patch sipm_simple_calibration

[theHenks]

Updated sipm_simple_calibration for more stability in simple calibration routine.

• Bug Fix peakfinder_σ to also scale within each bin_width step
• Bug Fix n_fwhm_noise_cut for the 0.0 case
• Use SavitzkyGolay smoothing prior to peak search routine to smoothen PE distribution and enhance accuracy
• Inlcude failsafe routine by simple maximum detection based on smoothed histograms

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 27 lines in your changes missing coverage. Please review.

Project coverage is 29.02%. Comparing base (113fc5f) to head (8c62c6a).
Report is 38 commits behind head on main.

Files with missing lines	Patch %	Lines
src/sipm_simple_calibration.jl	0.00%	27 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #120      +/-   ##
==========================================
- Coverage   29.88%   29.02%   -0.87%     
==========================================
  Files          37       37              
  Lines        3366     3466     +100     
==========================================
  Hits         1006     1006              
- Misses       2360     2460     +100     

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[fhagemann]

There is some code duplication at the end of this function (the fallback method).
This is fine for me. If you want to remove it, you could export the duplicate code into a separate function that takes bin_width_scale as input and call it in the loop as well as in the fallback case.

Done