Warn when modelbridge generates repeat candidates

[danielcohenlive]

Summary: The aim was to do this as low level as applicable.

Reviewed By: bletham

Differential Revision: D52735217

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D52735217

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (2157ebd) 94.78% compared to head (d22f088) 94.78%. Report is 1 commits behind head on main.

:exclamation: Current head d22f088 differs from pull request most recent head 09c4d83. Consider uploading reports for the commit 09c4d83 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2139      +/-   ##
==========================================
- Coverage   94.78%   94.78%   -0.01%     
==========================================
  Files         460      460              
  Lines       45435    45454      +19     
==========================================
+ Hits        43067    43085      +18     
- Misses       2368     2369       +1     

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[facebook-github-bot]

This pull request has been merged in facebook/Ax@9b336f064ff12a6361c4bee0f18c7e2fea17e24d.