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

ts_tapbundle/tapbundle.classes.tap.ts

@@ -117,7 +117,8 @@ export class Tap<T> {
   private settingsManager = new SettingsManager();
   private _skipCount = 0;
   private _filterTags: string[] = [];
-  
+  private _cleanupFunctions: Array<() => Promise<void> | void> = [];
+
   constructor() {
     // Get filter tags from environment
     if (typeof process !== 'undefined' && process.env && process.env.TSTEST_FILTER_TAGS) {
@@ -125,6 +126,14 @@ export class Tap<T> {
     }
   }
   
+  /**
+   * Register a cleanup function to be called when tap.start() finishes.
+   * Use this to tear down resources that would otherwise keep the event loop alive.
+   */
+  public registerCleanup(fn: () => Promise<void> | void) {
+    this._cleanupFunctions.push(fn);
+  }
+
   // Fluent test builder
   public tags(...tags: string[]) {
     const builder = new TestBuilder<T>(this);
@@ -610,6 +619,15 @@ export class Tap<T> {
       }
     }
 
+    // Run registered cleanup functions (e.g. tapNodeTools stopping SmartNetwork Rust bridge)
+    for (const cleanupFn of this._cleanupFunctions) {
+      try {
+        await cleanupFn();
+      } catch (e) {
+        // Don't let cleanup errors break the test run
+      }
+    }
+
     if (optionsArg && optionsArg.throwOnError && failReasons.length > 0) {
       if (!smartenvInstance.isBrowser && typeof process !== 'undefined') process.exit(1);
     }