Module hnsw 

HNSW (Hierarchical Navigable Small World) graph index.

Implements approximate nearest neighbor search with:

• Multi-layer navigable small world graph
• Greedy search from entry point through layers
• Beam search at target layer for recall
• Simple heuristic neighbor selection

Structs

HnswConfig

HNSW index configuration.

HnswIndex

HNSW index for approximate nearest neighbor search.