dimgigov
ef264d7d69
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New src/barabadb/search/ module with 9 components: - priority_queue.nim: BoundedHeap for O(log n) search - hnsw_opt.nim: heap-based searchLayer (2.4x faster, 92-99% recall@10) - inverted.nim: segment-based index with soft-delete and compaction - phrase.nim: positional phrase + proximity search - boolean.nim: recursive descent parser (AND/OR/NOT/ranges/wildcards) - ngram.nim: trigram index for O(1) fuzzy/prefix/wildcard - stemmer.nim: Porter2 stemmers (EN/BG/DE/FR/RU) - facet.nim: faceted search with filter pushdown - engine.nim: UnifiedSearchEngine combining all search types Performance (dim=128, efConstruction=200): N=1K: 0.30ms search, 99.6% recall@10 N=10K: 1.09ms search, 92.6% recall@10 N=50K: 2.26ms search, 75.5% recall@10 Includes search benchmarks (benchmarks/search_bench.nim), updated docs (en/bg fts.md, en/bg search.md), and crossmodal engine integration.