protect quantile prepresenation used in PIT

[eacharles]

No description provided.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (362ba6f) 100.00% compared to head (3ba9f5f) 100.00%.

❗ Current head 3ba9f5f differs from pull request most recent head 5494052. Consider uploading reports for the commit 5494052 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #172   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           34        34           
  Lines         2273      2274    +1     
=========================================
+ Hits          2273      2274    +1     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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Impacted Files	Coverage Δ
src/qp/metrics/pit.py	100.00% <100.00%> (ø)

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