Every enterprise customer can read their own audit log

Every enterprise deal has the same security questionnaire line: can we audit changes to our data? Most SaaS vendors answer "on request," which means an engineer greps logs on a shared database for a week.

Each of your customers runs in their own container on your bare metal. Their files have their own journal; their SQLite has its own history. You expose a read-only ?history URL on their data folder inside their account page. They see every mutation, timestamped, with revisions: and only theirs, because nothing else lives in that container.

The security questionnaire line now gets a URL instead of a paragraph. The feature cost nothing to build because it was already true of the substrate.

Per-customer audit logs aren't an enterprise tier you build. They're a property of per-customer containers.