chore(ci): capture warnings from pytest

[nijel]

Proposed changes

Checklist

• Lint and unit tests pass locally with my changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added documentation to describe my feature.
• I have squashed my commits into logic units.
• I have described the changes in the commit messages.

Other information

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.91%. Comparing base (5953dc7) to head (c893df3).
Report is 3 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2230      +/-   ##
==========================================
+ Coverage   80.32%   80.91%   +0.58%     
==========================================
  Files          34       34              
  Lines        3319     3463     +144     
  Branches      306      335      +29     
==========================================
+ Hits         2666     2802     +136     
- Misses        548      553       +5     
- Partials      105      108       +3