Duplicate check for historical data at mirakel@dwd.de

[ludwiglierhammer]

See issue #225

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 68.42105% with 6 lines in your changes missing coverage. Please review.

Project coverage is 88.78%. Comparing base (0ad2b6d) to head (92b0fd3).
Report is 73 commits behind head on main.

Files with missing lines	Patch %	Lines
cdm_reader_mapper/duplicates/duplicates.py	68.42%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #237      +/-   ##
==========================================
+ Coverage   84.23%   88.78%   +4.55%     
==========================================
  Files          76       78       +2     
  Lines        2817     2917     +100     
==========================================
+ Hits         2373     2590     +217     
+ Misses        444      327     -117     

Flag	Coverage Δ
unittests	88.78% <68.42%> (+4.55%)	⬆️

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