refactor(core): introduce debugName optional arg to ReactiveNode (angular#57710)

This commit contains the changes to core/primitives that used to be in angular#57073.

PR Close angular#57710

Author: AleksanderBodurri

goldens/public-api/core/primitives/signals/index.api.md

@@ -81,6 +81,7 @@ export interface ReactiveNode {
     // (undocumented)
     consumerMarkedDirty(node: unknown): void;
     consumerOnSignalRead(node: unknown): void;
+    debugName?: string;
     dirty: boolean;
     lastCleanEpoch: Version;
     liveConsumerIndexOfThis: number[] | undefined;

packages/core/primitives/signals/src/graph.ts

@@ -179,6 +179,11 @@ export interface ReactiveNode {
    * Called when a signal is read within this consumer.
    */
   consumerOnSignalRead(node: unknown): void;
+
+  /**
+   * A debug name for the reactive node. Used in Angular DevTools to identify the node.
+   */
+  debugName?: string;
 }
 
 interface ConsumerNode extends ReactiveNode {