fix(virtualstream): Expose transport localData to handlers via TypedTools; improve VirtualStream payload encode/decode to preserve built-ins and handle nested arrays/objects

ts/classes.typedtools.ts

@@ -2,6 +2,12 @@ import { TypedResponseError } from './classes.typedresponseerror.js';
 import * as plugins from './plugins.js';
 
 export class TypedTools {
+  /**
+   * Local data passed from the transport layer.
+   * This can contain connection-specific context like the WebSocket peer.
+   */
+  public localData: Record<string, any> = {};
+
   public async passGuards<T = any>(guardsArg: plugins.smartguard.Guard<T>[], dataArg: T) {
     const guardSet = new plugins.smartguard.GuardSet<T>(guardsArg);
     const guardResult = await guardSet.allGuardsPass(dataArg);