fix(agent): add getCollectionId to activity logs mock in test factory

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: alban bertolini

packages/agent/test/__factories__/forest-admin-client.ts

@@ -52,6 +52,7 @@ const forestAdminClientFactory = ForestAdminClientFactory.define(() => ({
   activityLogsService: {
     createActivityLog: jest.fn(),
     updateActivityLogStatus: jest.fn(),
+    getCollectionId: jest.fn().mockResolvedValue(null),
   },
   subscribeToServerEvents: jest.fn(),
   close: jest.fn(),