fix #59 removed video description nullability

[Basler182]

removed video description nullability

♻️ Current situation & Problem

#59

⚙️ Release Notes

The mapper is adapted so that it does not accept videos without a description and the model is adapted accordingly so that it no longer accepts null values and the null check is removed in the code

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[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 39.48%. Comparing base (f7effec) to head (6aaf89f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...cation/VideoSectionDocumentToVideoSectionMapper.kt	66.67%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #134      +/-   ##
============================================
+ Coverage     39.47%   39.48%   +0.02%     
- Complexity      791      792       +1     
============================================
  Files           265      265              
  Lines         10533    10532       -1     
  Branches       1480     1479       -1     
============================================
+ Hits           4157     4158       +1     
  Misses         6014     6014              
+ Partials        362      360       -2     

Flag	Coverage Δ
uitests	33.50% <100.00%> (-0.01%)	⬇️
unittests	33.35% <30.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...nford/spezi/modules/education/video/VideoScreen.kt	59.10% <100.00%> (+0.27%)	⬆️
...spezi/modules/education/videos/EducationUiState.kt	86.37% <100.00%> (ø)
...cation/VideoSectionDocumentToVideoSectionMapper.kt	83.88% <66.67%> (+3.88%)	⬆️

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[Basler182]

as far as i have seen, all videos already have a description. as soon as this is completely fixed, you are welcome to merge it @pauljohanneskraft

[eldcn]

Changed look good from my side 🚀 Let's wait for @pauljohanneskraft confirmation before merging

[eldcn]

We just confirmed this with @pauljohanneskraft that field is not nullable anymore, and the description will always be available. Merging :)