Disaster recovery measures to be added in /e/ docs
## Summary
Requested by users in helpdesk. No inforation regarding disaster recovery measures in /e/ docs
## Description
/e/ documentation site has limited information regarding how user data is stored and focuses mainly on the encryption aspect. It would be nice to also add disaster recovery measures that are in place.
## Mock-ups
> Murena cloud data with `nextcloud's server side encryption enabled` is stored in a replicated storage cluster. We take daily automated snapshots of the data which allows us to recover data quickly. These snapshots are retained for 7 days.
>
> We also have a cold backup for these snapshots synced daily to servers at a different DC for disaster recovery. These incremental backups are kept for 3 months.
Ref: https://helpdesk.e.foundation/#ticket/zoom/15067/58202
/cc @arnauvp @diroots
issue