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/reverseproxy.js

@@ -37,11 +37,11 @@ exports = module.exports = {
 
 const acme2 = require('./acme2.js'),
     apps = require('./apps.js'),
-    assert = require('assert'),
+    assert = require('node:assert'),
     blobs = require('./blobs.js'),
     BoxError = require('./boxerror.js'),
     constants = require('./constants.js'),
-    crypto = require('crypto'),
+    crypto = require('node:crypto'),
     dashboard = require('./dashboard.js'),
     debug = require('debug')('box:reverseproxy'),
     dns = require('./dns.js'),
@@ -50,12 +50,12 @@ const acme2 = require('./acme2.js'),
     ejs = require('ejs'),
     eventlog = require('./eventlog.js'),
     ipaddr = require('./ipaddr.js'),
-    fs = require('fs'),
+    fs = require('node:fs'),
     Location = require('./location.js'),
     mailServer = require('./mailserver.js'),
     network = require('./network.js'),
-    os = require('os'),
-    path = require('path'),
+    os = require('node:os'),
+    path = require('node:path'),
     paths = require('./paths.js'),
     safe = require('safetydance'),
     settings = require('./settings.js'),