Posture check: AWS ECS task definition is not configured with read-only access to container root filesystems
Query: ```config from cloud.resource where cloud.type = 'aws' AND api.name = 'aws-ecs-describe-task-definition' AND json.rule = status equals "ACTIVE" AND containerDefinitions[*].readonlyRootFilesystem any false or containerDefinitions[*].readonlyRootFilesystem does not exist```