Add CentOS Stream 9 and 10 AMI lookup support Add new CentOS Stream 9 and 10 operating system values, documentation, and CLI help entries. Since CentOS does not publish SSM AMI parameters, add an EC2 DescribeImages-based lookup path using the CentOS owner, architecture/name filters, and newest CreationDate selection, with tests covering latest AMI selection and related validation fixes. Co-authored-by: Octium Agent <agent@octium.dev>