Enforce compatibility of ratio metrics and analysis

[david26694]

RatioMetrics can only work when analysis type is delta method.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.30%. Comparing base (9570cf6) to head (1c701f3).

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #233      +/-   ##
==========================================
+ Coverage   96.28%   96.30%   +0.02%     
==========================================
  Files          17       17              
  Lines        1668     1679      +11     
==========================================
+ Hits         1606     1617      +11     
  Misses         62       62              

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