[diskann-quantization] Use f32::NAN instead of core::f32::NAN.

[Mark Hildebrand (hildebrandmw)]

Nightly emits a deprecation warning:

use of deprecated constant `std::f32::NAN`: replaced by the `NAN` associated constant on `f32`

This fixes that.

[Copilot]

🟢 Approval recommended

The import removal resolves the warning while preserving valid references and existing behavior.

0 open findings

What changed in this PR

Resolves a nightly deprecation warning in the min-max quantizer without changing behavior.

Changes:

• Removes use core::f32 so f32::NAN resolves to the primitive type’s associated constant.

File	Description
diskann-quantization/​src/​minmax/​quantizer.rs	Removes the import that selects deprecated module constants.

🧠 Review effort: Balanced

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[Codecov Comments Bot (codecov-commenter)]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.95%. Comparing base (27cdd95) to head (9bd0cd5).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1471      +/-   ##
==========================================
- Coverage   91.97%   90.95%   -1.03%     
==========================================
  Files         586      586              
  Lines      118178   118178              
==========================================
- Hits       108700   107490    -1210     
- Misses       9478    10688    +1210     

Flag	Coverage Δ
miri	90.95% <ø> (-1.03%)	⬇️
unittests	90.65% <ø> (-1.28%)	⬇️

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

Files with missing lines	Coverage Δ
diskann-quantization/src/minmax/quantizer.rs	96.81% <ø> (ø)

... and 50 files with indirect coverage changes

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