[object-persistor] import ProjectKey helper from history-v1 (#30600)

GitOrigin-RevId: c72aa4bf91569904a2072c74d6ed2f3c764d97bb

services/filestore/app/js/KeyBuilder.js

@@ -1,5 +1,5 @@
 import settings from '@overleaf/settings'
-import * as projectKey from './project_key.js'
+import projectKey from '@overleaf/object-persistor/src/ProjectKey.js'
 
 export default {
   getConvertedFolderKey,

services/filestore/app/js/project_key.js

@@ -1,20 +0,0 @@
-// Keep in sync with services/history-v1/storage/lib/project_key.js
-import path from 'node:path'
-
-//
-// The advice in http://docs.aws.amazon.com/AmazonS3/latest/dev/
-// request-rate-perf-considerations.html is to avoid sequential key prefixes,
-// so we reverse the project ID part of the key as they suggest.
-//
-export function format(projectId) {
-  const prefix = naiveReverse(pad(projectId))
-  return path.join(prefix.slice(0, 3), prefix.slice(3, 6), prefix.slice(6))
-}
-
-export function pad(number) {
-  return (number || 0).toString().padStart(9, '0')
-}
-
-function naiveReverse(string) {
-  return string.split('').reverse().join('')
-}