CookieboxCalibration: Normalize transmission by pulse energy and detect RoI robustly

[daniloefl]

This PR contains two elements:

1. The transmission calculation is affected currently due to variations in the pulse energy during the data collection. This is corrected here by normalizing not only by the angular dependence given by the FEL polarization, but also by the pulse energy within the data collected (which is now also calculated and stored for this purpose).
2. The region of interest containing the photoline can be given or auto-detected if it can be assumed the only other peak comes from the Auger-Meitner. In this PR, the autodetection is slightly improved by smoothing the signal beforehand.

[codecov]

Codecov Report

❌ Patch coverage is 86.36364% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.19%. Comparing base (c727444) to head (535d624).

Files with missing lines	Patch %	Lines
src/extra/applications/cookiebox.py	86.36%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #512      +/-   ##
==========================================
+ Coverage   73.72%   74.19%   +0.47%     
==========================================
  Files          35       35              
  Lines        6927     6926       -1     
==========================================
+ Hits         5107     5139      +32     
+ Misses       1820     1787      -33     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.