ordering comment

Author: oconnor663

crates/ty_python_semantic/src/types/newtype.rs

@@ -22,6 +22,10 @@ use ruff_python_ast as ast;
 /// - `typing.NewType`: `Type::ClassLiteral(ClassLiteral)` with `KnownClass::NewType`.
 /// - `Foo`: `Type::KnownInstance(KnownInstanceType::NewType(NewType { .. }))`
 /// - `x`: `Type::NewTypeInstance(NewType { .. })`
+///
+/// # Ordering
+/// Ordering is based on the newtype's salsa-assigned id and not on its values.
+/// The id may change between runs, or when the newtype was garbage collected and recreated.
 #[salsa::interned(debug, heap_size=ruff_memory_usage::heap_size)]
 #[derive(PartialOrd, Ord)]
 pub struct NewType<'db> {