//! Solver outcome and status taxonomy.
//!
//! Allocation-free `SolveStatus`, `TerminationReason`, and step-outcome categories shared by server and device. Non-convergence is a status, not an error.
//!
//! Defined by RFC 014 (Core Solver Outcome and Status Taxonomy). Lands in Milestone 1; this Phase 0 placeholder declares no public
//! items yet.
