use node: prefix for requires

mostly because code is being autogenerated by all the AI stuff using
this prefix. it's also used in the stack trace.

src/routes/apps.js

@@ -73,7 +73,7 @@ exports = module.exports = {
 
 const apps = require('../apps.js'),
     appstore = require('../appstore.js'),
-    assert = require('assert'),
+    assert = require('node:assert'),
     AuditSource = require('../auditsource.js'),
     BoxError = require('../boxerror.js'),
     constants = require('../constants.js'),