Update interface for CNO

[SCiarella]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 34.21%. Comparing base (2b22ab1) to head (710fd35).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/train.jl	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #161      +/-   ##
==========================================
- Coverage   34.27%   34.21%   -0.06%     
==========================================
  Files          16       16              
  Lines         601      602       +1     
==========================================
  Hits          206      206              
- Misses        395      396       +1     

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