I'm working on a self-hosted open source system for monitoring and alerting on stalled / crashed / overdue asynchronous workflows. I had some weird things I needed to monitor and log analysis was kind of a PITA for dealing with them so I built this instead:

https://crashguard.io

My favorite feature is I built a Stream Deck plugin for it so that I can monitor things from my Stream Deck XL while I'm doing other work, then if a button goes red or whatever I can just click it and it brings up the admin portal and shows me the workflow that failed.

It's still kind of in the alpha state but it does work pretty well.