Bugfix: KCF doesn't read csv files feature registered on source

[aolfat]

Description

Type of change

Does this correspond to an open issue?

Select type(s) of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have fixed any merge conflicts

[codecov]

Codecov Report

Merging #943 (8bfd111) into main (dadd2e0) will increase coverage by 19.53%.
Report is 22 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main     #943       +/-   ##
===========================================
+ Coverage   51.20%   70.74%   +19.53%     
===========================================
  Files          67        7       -60     
  Lines       13578      335    -13243     
===========================================
- Hits         6953      237     -6716     
+ Misses       5972       78     -5894     
+ Partials      653       20      -633     

see 62 files with indirect coverage changes

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