fix: ivf_iterator will copy query vectors

[alwayslove2013]

issue: #900

[mergify]

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[PwzXxm]

/kind bug

[PwzXxm]

/lgtm
/approve

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.56%. Comparing base (3c46f4c) to head (747d780).
Report is 224 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##           main     #901       +/-   ##
=========================================
+ Coverage      0   79.56%   +79.56%     
=========================================
  Files         0       81       +81     
  Lines         0     6270     +6270     
=========================================
+ Hits          0     4989     +4989     
- Misses        0     1281     +1281     

see 81 files with indirect coverage changes