https://www.supertechcrew.com/watchdog-keeping-system-always-running/

Using Watchdog to Always Keep a Machine Running

Watchdog is a daemon / subsystem used to monitor the basic health of a machine. If something goes wrong, such as a crashing program overloading the CPU, or no more free memory on the system, watchdog can safely reboot the machine, allowing your service to keep on going rather than wait for someone to come kick the machine.

Or, better yet, it has a repair option to run a script you give it that will attempt to repair the system, and only reboot as a last ditch effort.