Add internal feature for validate_num_of_signers

[StackOverflowExcept1on]

Resolves #736

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.50%. Comparing base (5f4ac6e) to head (3d9fdb4).
Report is 50 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #740      +/-   ##
==========================================
- Coverage   82.18%   81.50%   -0.69%     
==========================================
  Files          31       34       +3     
  Lines        3188     3287      +99     
==========================================
+ Hits         2620     2679      +59     
- Misses        568      608      +40     

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[conradoplg]

Thanks. This is failing CI but it's an unrelated issue that we'll sort out.

[conradoplg]

Looks good, thanks!