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[DO NOT MERGE] Reproduce flaky AnnIVFFlatTestF_int8.AnnIVFFlat/2 (recall 0) - #2815

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bdice wants to merge 6 commits into

NVIDIA:mainfrom

bdice:ci-repro-ivf-flat-int8-recall0

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[DO NOT MERGE] Reproduce flaky AnnIVFFlatTestF_int8.AnnIVFFlat/2 (recall 0)#2815
bdice wants to merge 6 commits into
NVIDIA:mainfrom
bdice:ci-repro-ivf-flat-int8-recall0

Commits on Oct 10, 2026
- [CI ONLY] Add diagnostics to IVF-Flat recall failures
  bdice
  committed
  8be02f2
- [CI ONLY] Repeat IVF-Flat int8/uint8 cosine test on V100 and H100
  bdice
  committed
  8ed8cff
- Test IVF-Flat cosine search with zero-norm centers
  bdice
  committed
  04fbec4
- Guard IVF-Flat cosine coarse search against zero-norm centers
  bdice
  committed
  8bd6e35
Commits on Oct 11, 2026
- Make the zero-norm center test pad the probes with list 0
  bdice
  committed
  2df4311
- [CI ONLY] Compare the zero-norm guard on and off, and run the full IVF-Flat test
  bdice
  committed
  ebfad2b