Migrate user.writefull.enabled -> user.writefull.promotionSet (#31475)

* feat: migrate from aiErrorAssist naming for disabling AI features to aiFeatures.enabled to avoid confusion

feat: keep aiErrorAssistant as setting on user object until migration is run

* feat: migrate writefull.enabled unset to instead use promotionSet false

* Update tools/migrations/20260213102825_swap_writefull_enabled_for_initialized.mjs

Co-authored-by: Mathias Jakobsen <mathias.jakobsen@overleaf.com>

* feat: addind backfill of ai features as a migration as well to help with dev environment setup

---------

Co-authored-by: Mathias Jakobsen <mathias.jakobsen@overleaf.com>
GitOrigin-RevId: fd3f0fc07c91678cd7fd1e0d5237221694b3027b

services/web/scripts/writefull/migrate_to_promotion_set.mjs

@@ -0,0 +1,30 @@
+import { db } from '../../app/src/infrastructure/mongodb.mjs'
+import { batchedUpdate } from '@overleaf/mongo-utils/batchedUpdate.js'
+import { scriptRunner } from '../lib/ScriptRunner.mjs'
+
+async function main(trackProgress) {
+  // if writefull.enabled is unset or null then the account has no promotion attached yet
+  await batchedUpdate(db.users, {}, [
+    {
+      $set: {
+        'writefull.initialized': {
+          $or: [
+            { $eq: ['$writefull.enabled', true] },
+            { $eq: ['$writefull.enabled', false] },
+          ],
+        },
+      },
+    },
+  ])
+  console.log('completed migration to writefull.initialized')
+}
+
+export default main
+
+try {
+  await scriptRunner(main)
+  process.exit(0)
+} catch (error) {
+  console.error({ error })
+  process.exit(1)
+}