* introduce QueryContext, which accumulates runtime info needed for executing search
* fmt
* propagate query context into segment internals
* [WIP] prepare idf stats for search query context
* Split SparseVector and RemmapedSparseVector to guarantee we will not mix them up on the type level
* implement filling of the query context with IDF statistics
* implement re-weighting of the sparse query with idf
* fmt
* update idf param only if explicitly specified (more consistent with diff param update
* replace idf bool with modifier enum, improve further extensibility
* test and fixes
* Update lib/collection/src/operations/types.rs
Co-authored-by: Arnaud Gourlay <arnaud.gourlay@gmail.com>
* review fixes
* fmt
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Co-authored-by: Arnaud Gourlay <arnaud.gourlay@gmail.com>
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