1174 Use DIVI data to scale initial values for LCT model

[lenaploetzke]

Changes and Information

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

• Method to calculate an initial value vector for an LCT model using reported RKI data now provides the option to scale the result so that the number of ICU patients equals the reported number in the DIVI data set.
• Added tests.

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 for new functionality has been added (Doxygen in the code and Markdown files if necessary)
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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)
• No large data files added in the whole history of commits(files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• On merge, add 2-5 lines with the changes (main added features, changed items, or corrected bugs) to the merge-commit-message. This can be taken from the briefly-list-the-changes above (best case) or the separate commit messages (worst case).

Closes #1174 .

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.98%. Comparing base (0c4965a) to head (286820e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1175      +/-   ##
==========================================
+ Coverage   96.97%   96.98%   +0.01%     
==========================================
  Files         148      148              
  Lines       13718    13779      +61     
==========================================
+ Hits        13303    13364      +61     
  Misses        415      415              

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