A SysOps administrator manages a fleet of EC2 instances running a custom application. Occasionally the application process hangs while the instance itself remains healthy (both EC2 status checks pass). The team publishes a custom CloudWatch metric named ApplicationHeartbeat every 60 seconds; a healthy process reports a value of 1, and no data point is published when the process hangs. The administrator needs an automated solution that restarts the application service on the affected instance without human intervention. Which approach meets this requirement?