Keep the question small
This entry preserves the monitoring thread from the original archive. The public material is an outline, rather than a finished hardware case study.
The useful question is rarely just whether a process exists. A model endpoint should answer a bounded request. A media service should be reachable through its intended route. Storage should have enough room for the next ordinary operation.
Evidence to add
I still need a device photo, an example check with private details removed, and an incident that shows whether the alert helped. This outline has no measured uptime results yet.