* Reapply "Increase the length of unsaved doc time before the editor is locked (#23431)"
This reverts commit d0efca398e59ca488c530ee9ec5ca76f29843679.
* Use pendingOpCreatedAt if inflightOpCreatedAt isn't set
GitOrigin-RevId: b3301d7cc1554215a4ba569537bd47beeefde20f