Recent change on UI break your UserScript. I dig little bit more on your code and found short-link class to bind remind me button on UI. Recent change remove class short-link so why it's not worked.
So to fix the problem you must change below code inside function process_page(posts).
I noticed recently that this stopped working and the CSS class short-link needed changing to js-share-link, here's an update:
// @name Stack Exchange: Add Timeline and Revisions links to posts
// @description Adds links to posts to always show history and links to questions to show the Timeline".
// @namespace StackExchange