Lume: Inspectable Hybrid Search Engine with BM25, GTR-T5, and Entity Graph

Lume is a Rust-based hybrid search engine combining field-aware BM25, GTR-T5 dense vectors, and a significance-scored entity graph, designed as an MCP server for agentic retrieval pipelines. All lexical and graph operations run locally; dense vector calls default to localhost. Every score is named and tunable, making retrieval steps fully inspectable rather than opaque.