add BadBaselineIdx selection error

[d3v-null]

this is for MWATelescope/Birli#150

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.40%. Comparing base (6d3e207) to head (7e5e2b7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
+ Coverage   90.39%   90.40%   +0.01%     
==========================================
  Files          20       20              
  Lines        9318     9340      +22     
==========================================
+ Hits         8423     8444      +21     
- Misses        895      896       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.