Keep a record of every page change: publishes, edits and saves

We manage 100+ pages across several team members. We need a record of every change to each page: when it first went live, when it was last published, who published or unpublished it, and who edited or saved it, with the date and time.

Right now there’s no easy way to answer “when did this page go live, and who changed it?” That makes it hard to track launches, audit changes and troubleshoot issues.