Extract getEndDateForRPO method to utils

This will allow sharing with other functionality.

GitOrigin-RevId: a6e11447180511cc3741ca03f4996ef7ceb45ea5

services/history-v1/backupVerifier/utils.mjs

@@ -11,6 +11,13 @@ export function objectIdFromDate(time) {
   return ObjectId.createFromTime(time.getTime() / 1000)
 }
 
+/**
+ * @return {Date}
+ */
+export function getEndDateForRPO() {
+  return new Date(Date.now() - RPO)
+}
+
 /**
  * Creates a startDate, endDate pair that checks a period of time before the RPO horizon
  *

services/history-v1/storage/lib/backupVerifier.mjs

@@ -15,19 +15,12 @@ import path from 'node:path'
 import projectKey from './project_key.js'
 import streams from './streams.js'
 import objectPersistor from '@overleaf/object-persistor'
-import { RPO } from '../../backupVerifier/utils.mjs'
+import { getEndDateForRPO } from '../../backupVerifier/utils.mjs'
 
 /**
  * @typedef {import("@overleaf/object-persistor/src/PerProjectEncryptedS3Persistor.js").CachedPerProjectEncryptedS3Persistor} CachedPerProjectEncryptedS3Persistor
  */
 
-/**
- * @return {Date}
- */
-export function getEndDateForRPO() {
-  return new Date(Date.now() - RPO)
-}
-
 /**
  * @param {string} historyId
  * @param {string} hash