Compliance: Setup database backup

[victorskl]

We can easily get started by leveraging RDS auto snapshot that will give point-in-time (PIT) recovery objective up to the defined date range.

For extended DR objectives (RPO, RTO) - we could leverage AWS Backup for RDS.

In current Portal (v1), we use 7 days PIT and, up to 6 weeks for weekly backup.

[victorskl]

See https://github.com/umccr/data-portal-apis/blob/dev/docs/PORTAL_BACKUP.md

[victorskl]

Writing Week: Update risk management