Carry the new layout fields through the hand-built fixtures

The record fixtures spell their metas and resolved layouts out in full,
so the name-from-input fields reach them as empty. `named_value!`'s
example moves to `ignore`: its `for T` arm implements a core-types trait
on the value type, which only core-types itself may do.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

node-graph/nodes/gstd/src/render_node.rs

@@ -272,6 +272,7 @@ mod tests {
 				plan: Vec::new(),
 				layout: layout.clone(),
 				lane_invariant: u32::MAX,
+				named_writes: Vec::new(),
 			},
 		);
 		let GPoll::Final(result) = core_types::record::serve_input(&graph, &ctx, &frames) else {