Update codecov and add flag for integration tests

[pvk-developer]

Resolves #135
CU-86b2mqbbm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.53%. Comparing base (b296c14) to head (924036c).
Report is 39 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #141      +/-   ##
==========================================
+ Coverage   79.39%   86.53%   +7.14%     
==========================================
  Files           7        7              
  Lines         728      728              
==========================================
+ Hits          578      630      +52     
+ Misses        150       98      -52     

Flag	Coverage Δ
integration	79.39% <ø> (?)
unit	22.25% <ø> (?)

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