pq

type ADCTable struct {
	Distances [][]float32 // [M][KSub] distances
}

type EncodedIndex struct {
	PQ    *ProductQuantizer
	Codes []PQCode
}

type PQCode struct {
	ID    int
	Codes []uint8
}

type ProductQuantizer struct {
	M         int           // Number of subquantizers
	KSub      int           // Codebook size per subquantizer (typically 256 for 8-bit)
	D         int           // Vector dimension
	DSub      int           // Dimension per subquantizer
	Codebooks [][][]float32 // Codebooks[m][k][d] - m subquantizers, k codes, d dims
	Trained   bool
}

type SearchResult struct {
	ID    int
	Score float32
}