Merge pull request #18289 from overleaf/ac-ar-eslint-return-await

Add ESLint rule @typescript-eslint/return-await to backend services

GitOrigin-RevId: 75e3e32597827fcc852e69d479515fc72e8f45e4

services/document-updater/scripts/flush_all.js

@@ -2,7 +2,7 @@ const ProjectFlusher = require('../app/js/ProjectFlusher')
 
 async function main() {
   console.log('Flushing all projects')
-  return new Promise((resolve, reject) => {
+  return await new Promise((resolve, reject) => {
     const options = {
       limit: 100000,
       concurrency: 5,