Specify Instantiable’s code-gen name

Sources/SafeDI/Decorators/Instantiable.swift

@@ -55,7 +55,7 @@
 ///   - isRoot: Whether the decorated type represents a root of a dependency tree.
 ///   - additionalTypes: The types (in addition to the type decorated with this macro) of properties that can be decorated with `@Instantiated` and yield a result of this type. The types provided *must* be either superclasses of this type or protocols to which this type conforms.
 ///   - conformsElsewhere: Whether the decorated type already conforms to the `Instantiable` protocol elsewhere. If set to `true`, the macro does not enforce that this declaration conforms to `Instantiable`.
-@attached(member, names: arbitrary)
+@attached(member, names: named(ForwardedProperties))
 public macro Instantiable(
     isRoot: Bool = false,
     fulfillingAdditionalTypes additionalTypes: [Any.Type] = [],