Is there any reason you want a self-hosted service for this rather than making an account with TMDB or TVDB? Trakt fetches all of its metadata from those 2 sites (it prioritizes TMDB).
Not that you shouldn’t self-host an alternative, but you don’t have to.
I have everything containerized (Podman) on my Debian PC and use Diun to check for updates and send notifications to a Discord server that I monitor. I do all of my updates manually so I don’t update unless I have time to troubleshoot; if it breaks I still have the configs and data so I can delete the container and start over.
I also do monthly backups to cold storage (yeah, they should be weekly/biweekly but it’s just personal data that I’m okay with losing). I don’t use a RAID config or BTFS/ZFS like some do, so it’s pretty easy to just set it and forget it. It really depends on what you’re trying to do, how bulletproof it needs to be, and how you like to organize things.
I don’t mean to be glib or upset you, but you still have lifetime access to the versions of Sublime Text for which you paid; you just don’t get free updates to the next version. AFAIK, that’s been the way they’ve done things for years.