Guard against max call stack

[trieloff]

• fix(distiller): harden aggregates against call stack size overflow
• fix(stats): avoid overflow in confidence interval calculation

same fix adobe/helix-website#698

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.85%. Comparing base (b4fa5ee) to head (b94e899).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
+ Coverage   96.76%   96.85%   +0.09%     
==========================================
  Files          17       17              
  Lines        4670     4681      +11     
==========================================
+ Hits         4519     4534      +15     
+ Misses        151      147       -4     

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[github-actions]

This PR will trigger a patch release when merged.

[adobe-bot]

🎉 This PR is included in version 1.13.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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