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/platform.js

@@ -15,7 +15,7 @@ exports = module.exports = {
 
 const apps = require('./apps.js'),
     appTaskManager = require('./apptaskmanager.js'),
-    assert = require('assert'),
+    assert = require('node:assert'),
     AuditSource = require('./auditsource.js'),
     BoxError = require('./boxerror.js'),
     constants = require('./constants.js'),
@@ -24,7 +24,7 @@ const apps = require('./apps.js'),
     database = require('./database.js'),
     debug = require('debug')('box:platform'),
     dockerProxy = require('./dockerproxy.js'),
-    fs = require('fs'),
+    fs = require('node:fs'),
     infra = require('./infra_version.js'),
     locks = require('./locks.js'),
     oidcServer = require('./oidcserver.js'),