Fix flaky history vector test

[stv0g]

Fixes #41

[codecov]

Codecov Report

Merging #43 (1aa8475) into main (2c71ca6) will increase coverage by 30.61%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##             main      #43       +/-   ##
===========================================
+ Coverage   26.86%   57.47%   +30.61%     
===========================================
  Files          30       30               
  Lines        1798     1799        +1     
===========================================
+ Hits          483     1034      +551     
+ Misses       1246      644      -602     
- Partials       69      121       +52     

Flag	Coverage Δ
integration	26.84% <0.00%> (-0.02%)	⬇️
unit	39.79% <100.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
internal/history/history.go	100.00% <100.00%> (+53.33%)	⬆️

... and 6 files with indirect coverage changes