1420 Implement SEIRDB model

[HenrZu]

Changes and Information

Please briefly list the changes (main added features, changed items, or corrected bugs) made:

• Extended the SEIR model to a SEIRDB (with D: dead but not yet buried and B: buried) structure.
• Additional parameters are:
  a probability to recover (instead of getting "Removed" from SEIR) with counterprobability to die
  a time between dying and getting buried
  a probability to infect from dead but not yet buried state D

If need be, add additional information and what the reviewer should look out for in particular:

Merge Request - Guideline Checklist

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Checks by code author

• Every addressed issue is linked (use the "Closes #ISSUE" keyword below)
• New code adheres to coding guidelines
• No large data files have been added (files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• Tests are added for new functionality and a local test run was successful (with and without OpenMP)
• Appropriate documentation within the code (Doxygen) for new functionality has been added in the code
• Appropriate external documentation (ReadTheDocs) for new functionality has been added to the online documentation
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• (For ABM development) Checked benchmark results and ran and posted a local test above from before and after development to ensure performance is monitored.

Checks by code reviewer(s)

• Corresponding issue(s) is/are linked and addressed
• Code is clean of development artifacts (no deactivated or commented code lines, no debugging printouts, etc.)
• Appropriate unit tests have been added, CI passes, code coverage and performance is acceptable (did not decrease)
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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.27%. Comparing base (47f4820) to head (fcb6cd4).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1424      +/-   ##
==========================================
- Coverage   97.29%   97.27%   -0.03%     
==========================================
  Files         180      184       +4     
  Lines       15646    15807     +161     
==========================================
+ Hits        15223    15376     +153     
- Misses        423      431       +8     

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[kilianvolmer]

Thanks for the fast implementation! It looks overall good to me, I just made some minor remarks, mostly about documentation.
I do, however, have one big question: Which model are you implementing here? I thought you want to implement the Legrande model, but that contains a Hospitalized compartment. Did I get that wrong?

[HenrZu]

Thank you for the fast review :)
Regarding the model structure. The idea to extend the model in this way was proposed by Martin. This is not directly connected to a specific paper.

[kilianvolmer]

Thanks for the quick changes! One small typo and please remove the formatting in the warning/error messages. Then we are ready to merge :)