//! The regional matcher: load a graph, pull jobs, solve, publish results.
//!
//! A replica serves one `(graph, region)`, loading the pinned graph before it
//! touches the work queue and never claiming more work than it has handler
//! capacity to answer. CPU solve admission is bounded independently from
//! validation and result I/O. It owns no vehicle state and answers each
//! [`SolveJob`](crate::protocol::SolveJob) with one
//! [`SolveResult`](crate::protocol::SolveResult).