Pin scipy to a stable version due to import issue

[panagiotisanagnostou]

As of June 23, 2025, the latest scipy release has a critical import issue (see statsmodels/statsmodels#9584). Temporarily pinning scipy to a healthy version until the upstream problem is resolved.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.17%. Comparing base (b5dea70) to head (74b64ad).
Report is 9 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #47   +/-   ##
=======================================
  Coverage   94.17%   94.17%           
=======================================
  Files           5        5           
  Lines         996      996           
=======================================
  Hits          938      938           
  Misses         58       58           

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