Implements validate_ep

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 97.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 71.24%. Comparing base (c2c98cc) to head (0595326).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
onnx_diagnostic/export/validate.py	96.22%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #46      +/-   ##
==========================================
+ Coverage   70.94%   71.24%   +0.30%     
==========================================
  Files          63       64       +1     
  Lines        5861     5926      +65     
==========================================
+ Hits         4158     4222      +64     
- Misses       1703     1704       +1     

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