//! Orphan tool-call detection types (Goal 153).
//!
//! Describes a tool call that was dispatched but never completed
//! (no matching `tool` result message in the transcript).
//!
//! Split from `session.rs` during the Goal 221 module refactor.
/// Goal-153: describes a tool call that was dispatched but never completed
/// (no matching `tool` result message in the transcript).