Avoid intermediate dependency node id strings

Signed-off-by: Alexey Orlenko's AI Agent <robot@aqrln.net>

Author: tensordreams

query-compiler/core/src/query_graph/mod.rs

@@ -131,6 +131,11 @@ impl NodeRef {
     pub fn id(&self) -> String {
         self.node_ix.index().to_string()
     }
+
+    /// Returns the raw index of the Node.
+    pub fn index(&self) -> usize {
+        self.node_ix.index()
+    }
 }
 
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]

query-compiler/query-compiler/src/binding.rs

@@ -16,7 +16,7 @@ pub fn node_result(node: NodeRef) -> Cow<'static, str> {
 }
 
 pub fn projected_dependency(source: NodeRef, field: &SelectedField) -> Cow<'static, str> {
-    format!("{}{FIELD_SEPARATOR}{}", source.id(), field.prisma_name()).into()
+    format!("{}{FIELD_SEPARATOR}{}", source.index(), field.prisma_name()).into()
 }
 
 pub fn join_parent() -> Cow<'static, str> {