fix(tapbundle_serverside): add TapNodeTools cleanup hooks to stop SmartNetwork processes after tests

ts_tapbundle_serverside/classes.tapnodetools.ts

@@ -1,12 +1,18 @@
 import { TestFileProvider } from './classes.testfileprovider.js';
 import * as plugins from './plugins.js';
 
-class TapNodeTools {
+export interface ITapCleanupTarget {
+  registerCleanup: (fn: () => Promise<void> | void) => void;
+}
+
+export class TapNodeTools {
   private smartshellInstance: plugins.smartshell.Smartshell;
   private smartnetworkInstance: plugins.smartnetwork.SmartNetwork;
   public testFileProvider = new TestFileProvider();
 
-  constructor() {}
+  constructor(tapArg: ITapCleanupTarget) {
+    tapArg.registerCleanup(() => this.cleanup());
+  }
 
   private qenv: plugins.qenv.Qenv;
   public async getQenv(): Promise<plugins.qenv.Qenv> {
@@ -75,7 +81,7 @@ class TapNodeTools {
   /**
    * create and return a smartmongo instance
    */
-  public async createSmartmongo() { 
+  public async createSmartmongo() {
     const smartmongoMod = await import('@push.rocks/smartmongo');
     const smartmongoInstance = new smartmongoMod.SmartMongo();
     await smartmongoInstance.start();
@@ -217,6 +223,15 @@ class TapNodeTools {
       `Could not find ${countArg} consecutive free ports in range ${options.startPort}-${options.endPort}`
     );
   }
-}
 
-export const tapNodeTools = new TapNodeTools();
+  /**
+   * Clean up long-lived resources (e.g. the SmartNetwork Rust bridge process)
+   * so the Node.js event loop can drain naturally.
+   */
+  public async cleanup() {
+    if (this.smartnetworkInstance) {
+      await this.smartnetworkInstance.stop();
+      this.smartnetworkInstance = null;
+    }
+  }
+}