Fix 1474 - add fields to result object - correct calculation of number of clps.

[joernweissenborn]

Fixes #1474

• This adds additional_penalty to the result object and renames nr_clp back to number_of_clps.
• Correct degrees_of_freedom calculation.

[github-actions[bot]]

:point_left: Launch a binder notebook on branch _joernweissenborn/pyglotaran/staging1474

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 87.50000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 85.2%. Comparing base (2d0fc21) to head (0884198).

Files	Patch %	Lines
glotaran/optimization/optimization.py	50.0%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## staging #1484 +/- ## ======================================= Coverage 85.2% 85.2% ======================================= Files 91 91 Lines 3735 3756 +21 Branches 726 734 +8 ======================================= + Hits 3184 3203 +19 - Misses 438 440 +2 Partials 113 113 ```

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[jsnel]

Evaluated PR running study_fluorescence\fluorescence_global_and_target_analysis.ipynb.

On main: Before this PR: AFter this PR:

Conclusion: this does indeed resolve issue 1474.