ci: clean up coverage reporting

[flying-sheep]

this way we don’t have the duplicate coverage run -m pytest --cov which I’m sure only works incidentally

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 31.68%. Comparing base (3f83143) to head (8484983).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

❌ Your project status has failed because the head coverage (31.68%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2104       +/-   ##
===========================================
- Coverage   85.56%   31.68%   -53.89%     
===========================================
  Files          46       46               
  Lines        7080     7080               
===========================================
- Hits         6058     2243     -3815     
- Misses       1022     4837     +3815     

see 34 files with indirect coverage changes