[MOD-14957] Add SQ8 support for tiered HNSW - #1029

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dor-forer-MOD-14957-tiered-hnsw-sq8

Commits on Sep 2, 2026

[MOD-14957] Add SQ8 quantization support for tiered HNSW index (#5)
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3b70745
[MOD-14957] Complete tiered SQ8 transition handling
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173b6a0
[MOD-14957] Publish deferred HNSW backend atomically
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f5bcaab
Use double precision for SQ8 mean accumulation
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aa546be
Restore synchronization for tiered backend state
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9778c2b
Align HNSW guard helper definitions
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e6a442f
Reuse SQ8 input conversion helper
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669546c
Handle unpublished backend in tiered query paths
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ac01be7
Limit publication changes to backend lifetime
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3328f6c
Simplify tiered ad-hoc routing
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86f1ab5
Simplify tiered allocation accounting
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5b742d2
Track search mode during SQ8 accumulation
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e6e4a4e