Adjusted EForms SDK fields import validation

[kaleanych]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 95.16129% with 3 lines in your changes missing coverage. Please review.

Project coverage is 87.44%. Comparing base (9ba8fdd) to head (65e2363).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
...backend/fields_registry/adapters/github_manager.py	91.17%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #397      +/-   ##
===========================================
+ Coverage    87.22%   87.44%   +0.21%     
===========================================
  Files          205      207       +2     
  Lines         8667     8711      +44     
===========================================
+ Hits          7560     7617      +57     
+ Misses        1107     1094      -13     

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