//! Engine FSM, event schema, and supporting types (plan #005 U1).
//!
//! Plan #005 U1 defines the type vocabulary the FSM operates over: the
//! 5-variant `Connection` state machine, the 15-variant `EngineEvent`
//! schema, the `Input` enum, and structured `EngineError`. The actual FSM
//! implementation (`async fn handle(input)`), the JSONL journal, and the
//! `EngineHandle` actor wrapper live in subsequent units — this module
//! intentionally exports only the data shapes today.
pub use EngineError;
pub use ;
pub use ;
pub use ;
pub use ;
pub use ;