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//! Full-text indexing and retrieval.
//!
//! The lexical half of the engine. Task 12 builds the versioned analysis
//! pipeline whose identity is index metadata; tasks 13 through 15 build the
//! postings, the scorer, dynamic pruning, and the precision surface on top
//! of it.
/// Explicit test-only observations propagated to this query's lexical worker.
/// The BM25 scorer and corpus statistics.
/// Persisted posting blocks with positions.
/// Byte-quantized document length norms.
/// The sorted, front-coded term dictionary.
/// The lexical index across segments.
pub
pub
/// The sealed segment: the persisted posting format on the query path.
/// The exhaustive-OR scorer and task 14 oracle.
/// Dynamic pruning: block-max MAXSCORE and WAND.
/// Phrase matching over stored positions.
/// Prefix queries over the sorted dictionary.
/// Bounded fuzzy matching.
/// Double Metaphone phonetic encoding.
pub
/// Snippets and match offsets.
/// Structured query descriptions and deterministic expansion provenance.
pub