Formalize backends and apply wrappers automatically.

[tobiasraabe]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.12%. Comparing base (821ee83) to head (b3011f1).
Report is 2 commits behind head on main.

❗ Current head b3011f1 differs from pull request most recent head 4b66ae1. Consider uploading reports for the commit 4b66ae1 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #95       +/-   ##
===========================================
+ Coverage   52.14%   91.12%   +38.98%     
===========================================
  Files          17       17               
  Lines         652      665       +13     
===========================================
+ Hits          340      606      +266     
+ Misses        312       59      -253     

Flag	Coverage Δ
end_to_end	89.17% <100.00%> (?)
unit	52.48% <91.66%> (+0.33%)	⬆️

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