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/tasks.js

@@ -47,12 +47,12 @@ exports = module.exports = {
     _TASK_SLEEP: 'sleep'
 };
 
-const assert = require('assert'),
+const assert = require('node:assert'),
     BoxError = require('./boxerror.js'),
     database = require('./database.js'),
     debug = require('debug')('box:tasks'),
     logs = require('./logs.js'),
-    path = require('path'),
+    path = require('node:path'),
     paths = require('./paths.js'),
     safe = require('safetydance'),
     shell = require('./shell.js')('tasks'),