thanks for this. I have created this rule and have added an automatic reboot in the event HomeKit Integration is dead by creating a virtual push button and using Hubitat Rebooter app. My updated rule isn’t the cleanest solution and I don't really like it but will see how it works out. For those interested, I include it below.
Coupled with this rule, I also included a simple notification rule to notify me that hubitat booted up and disabled the notification (in red below) that "HomeKit Lives!" so that I do not get a notification if HK integration is working every 15 min (but I will get one when HK Integration is dead and hopefully another once once my system boots up again after rebooter is triggered).