Fix missing cancelTask in mock SchedulerService implementations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@spotify.com>

packages/backend-test-utils/src/services/MockSchedulerService.ts

@@ -95,6 +95,10 @@ export class MockSchedulerService implements SchedulerService {
     });
   }
 
+  async cancelTask(_id: string): Promise<void> {
+    // No-op in mock
+  }
+
   async triggerTask(id: string): Promise<void> {
     const task = this.#tasks.get(id);
     if (!task) {

packages/backend-test-utils/src/services/mockServices.ts

@@ -526,6 +526,7 @@ export namespace mockServices {
       getScheduledTasks: jest.fn(),
       scheduleTask: jest.fn(),
       triggerTask: jest.fn(),
+      cancelTask: jest.fn(),
     }));
   }