//! Salsa-based incremental computation layer.
//!
//! Phase A scaffold: defines the `RootDatabase`, a `SourceFile` input, and a
//! trivial `parsed_doc` query that wraps `diagnostics::parse_document`. Not yet
//! wired into `Backend` — this exists so downstream phases can grow queries on
//! top of it incrementally.
// RootDatabase reserved for Phase E.
pub use ;
// FileId construction is test-only today.
pub use ;