fix: Avoid processing the same nodes multiple times in order to avoid duplicated transient nodes.

libs/pavexc/src/compiler/analyses/call_graph/core_graph.rs

@@ -162,6 +162,7 @@ where
     let root_node_index = add_node_for_component(&mut call_graph, &mut node_deduplicator, root_id);
     let mut nodes_to_be_visited: IndexSet<VisitorStackElement> =
         IndexSet::from_iter([VisitorStackElement::orphan(root_node_index)]);
+    let mut processed_nodes = HashSet::new();
 
     loop {
         while let Some(node_to_be_visited) = nodes_to_be_visited.pop() {
@@ -179,6 +180,11 @@ where
                 }
             }
 
+            // We've already processed dependencies for this node.
+            if processed_nodes.contains(&current_index) {
+                continue;
+            }
+
             // We need to recursively build the input types for all our compute components;
             if let CallGraphNode::Compute { component_id, .. } = call_graph[current_index].clone() {
                 let component = component_db.hydrated_component(component_id, computation_db);
@@ -243,6 +249,8 @@ where
                     }
                 }
             }
+
+            processed_nodes.insert(current_index);
         }
 
         let indexes = call_graph.node_indices().collect::<Vec<_>>();