fix(devop): code coverage failing

[Bento007]

Reason for Change

• code coverage is broken.

Changes

• simplify path
• include-hidden: true
• add codecov.yaml to track test coverage for individual components.
  

Testing

• verified code coverage works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.73%. Comparing base (e06940c) to head (6c4d68f).
Report is 117 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1149      +/-   ##
==========================================
+ Coverage   89.66%   90.73%   +1.07%     
==========================================
  Files          18       18              
  Lines        1944     2061     +117     
==========================================
+ Hits         1743     1870     +127     
+ Misses        201      191      -10     

Components	Coverage Δ
cellxgene_schema_cli	92.15% <88.77%> (+1.47%)	⬆️
migration_assistant	91.26% <100.00%> (ø)
schema_bump_dry_run_genes	79.80% <ø> (ø)
schema_bump_dry_run_ontologies	99.53% <100.00%> (ø)