glm-5.3-flash
5474141f2b
Task core-engine-value-constructors (wave-3 pre-work). All four value types are #[non_exhaustive] (ADR-017 §3), so downstream engine crates cannot struct-literal-construct them (E0639). Give engines a sanctioned construction path without weakening the consumer posture: pub #[doc(hidden)] full-field constructors (Job::from_row, StreamEvent:: from_row, Schedule::new, Wake::new), each doc-commented as engine- construction-only — not contract surface, not covered by ADR-017's semver-minor field-addition promise; a field addition changes the signature and is a lockstep-duty event (ADR-017 §5). Core tests now construct through the new constructors; no behavior change.