Ensure deletion protection is enabled for Amazon Relational Database Service (Amazon RDS) clusters

Deletion Protection feature has been disabled for your Aurora database clusters (provisioned and serverless) which may cause unwanted loss of data.

In AWS Console -

1. Sign in to the AWS Console and open the RDS Console.
2. Under Databases, choose the cluster you wish to edit.
3. Select Modify.
4. Under Additional Configuration, check the box next to Enable deletion protection.

In Terraform -

1. In the aws_rds_cluster resource, set 'deletion_protection' to 'true'.

References:
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_DeleteInstance.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/rds_cluster#deletion_protection