Feature Request/Idea: Remove inactive user accounts

Overview of the Feature Request
As an instance administrator
I can set a duration after which, inactive user accounts will be removed
In order to avoid preserving old accounts and personal information

What kind of user is the feature intended for?
(Example users roles: API User, Curator, Depositor, Guest, Superuser, Sysadmin)
used by Sysadmin : configuration of the Dataverse instance,
affecting all types user accounts

What inspired the request?
GDPR declaration for the entrepot.recherche.data.gouv.fr instance

Any brand new behavior do you want to add to Dataverse?
Allow instance administrators to set a duration e.g. InactiveUsersPreservationDuration (if the duration is not set, then inactive user accounts are always preserved, as currently),
user accounts that didn't log in for this duration are sent a notification informing them that if they don't log in within one month (maybe this would also have to be configurable), the user account will be deleted.

The issue names no files, tests, or entry points. Start by locating how Dataverse stores instance configuration and user login activity, then trace the existing account notification and deletion flows. Done should include configurable inactivity and warning periods, notifications, and deletion behavior while preserving accounts when no duration is configured.