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/backupformat/rsync.js

@@ -9,23 +9,23 @@ exports = module.exports = {
     _restoreFsMetadata: restoreFsMetadata
 };
 
-const assert = require('assert'),
+const assert = require('node:assert'),
     async = require('async'),
     backupTargets = require('../backuptargets.js'),
     BoxError = require('../boxerror.js'),
-    crypto = require('crypto'),
+    crypto = require('node:crypto'),
     DataLayout = require('../datalayout.js'),
     { DecryptStream } = require('../hush.js'),
     debug = require('debug')('box:backupformat/rsync'),
     { EncryptStream } = require('../hush.js'),
-    fs = require('fs'),
+    fs = require('node:fs'),
     HashStream = require('../hash-stream.js'),
     hush = require('../hush.js'),
-    path = require('path'),
+    path = require('node:path'),
     paths = require('../paths.js'),
     ProgressStream = require('../progress-stream.js'),
     promiseRetry = require('../promise-retry.js'),
-    { Readable } = require('stream'),
+    { Readable } = require('node:stream'),
     safe = require('safetydance'),
     shell = require('../shell.js')('backupformat/rsync'),
     stream = require('stream/promises'),