Ensure deletion protection is enabled for AWS QLDB Ledger

Not enabling deletion protection for AWS QLDB Ledger can impact the availability of the data.

Delete protection for QLDB is enabled by default when using Terraform, however the setting can be overridden. For additional security considerations, see the AWS documentation.

In Terraform -

1. In the aws_qldb_ledger resource, set the deletion_protection field to true.

Resources:
https://docs.aws.amazon.com/qldb/latest/developerguide/what-is.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/qldb_ledger#deletion_protection