Hybrid retrieval features for [IssunDB](https://github.com/IssunDB/issun-db).
This crate combines graph traversal, vector and text search, and property filters with score fusion and subgraph materialization.
It is an internal crate; applications should used the [`issundb`](https://crates.io/crates/issundb) crate, instead of directly using this crate.
MIT or Apache-2.0.