[python] Fix vector search import

[ivirshup]

Fixes #1283

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.36%. Comparing base (dc4eb1f) to head (dfd61c3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1287      +/-   ##
==========================================
- Coverage   92.68%   91.36%   -1.33%     
==========================================
  Files          38       82      +44     
  Lines        2953     6482    +3529     
==========================================
+ Hits         2737     5922    +3185     
- Misses        216      560     +344     

Flag	Coverage Δ
unittests	91.36% <100.00%> (-1.33%)	⬇️

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