feat(apps-engine): default runtime backend to node

Swap the default apps-engine runtime backend from deno to node so the
node runtime is exercised by the standard API test suite. The deno
runtime can still be selected via APPS_ENGINE_RUNTIME_BACKEND='deno'.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QzzSPVtd9ZcpaezJQtw6mm

Author: claude

.changeset/apps-engine-runtime-default-node.md

@@ -0,0 +1,6 @@
+---
+'@rocket.chat/apps': minor
+'@rocket.chat/meteor': minor
+---
+
+Changes the default apps-engine runtime backend from `deno` to `node`. The previous behavior can be restored by setting the environment variable `APPS_ENGINE_RUNTIME_BACKEND='deno'`

packages/apps/src/server/managers/AppRuntimeManager.ts

@@ -19,15 +19,15 @@ export type ExecRequestOptions = {
 	timeout?: number;
 };
 
-const { APPS_ENGINE_RUNTIME_BACKEND = 'deno' } = process.env;
+const { APPS_ENGINE_RUNTIME_BACKEND = 'node' } = process.env;
 
 export const nodeRuntimeFactory = (manager: AppManager, appPackage: IParseAppPackageResult, storageItem: IAppStorageItem) =>
 	new NodeRuntimeSubprocessController(manager, appPackage, storageItem);
 
 export const denoRuntimeFactory = (manager: AppManager, appPackage: IParseAppPackageResult, storageItem: IAppStorageItem) =>
 	new DenoRuntimeSubprocessController(manager, appPackage, storageItem);
 
-const defaultRuntimeFactory = APPS_ENGINE_RUNTIME_BACKEND === 'node' ? nodeRuntimeFactory : denoRuntimeFactory;
+const defaultRuntimeFactory = APPS_ENGINE_RUNTIME_BACKEND === 'deno' ? denoRuntimeFactory : nodeRuntimeFactory;
 
 export class AppRuntimeManager {
 	private readonly subprocesses: Record<string, IRuntimeController> = {};