Spyglass looks interesting, providing a unified search GUI for which I use a bunch of CLI search tools (ripgrep, ripgrep-all, and now bogrep) as well as some simple bash scripts.
Somehow I still prefer some CLI-based tooling though which I can configure as needed instead of a fully-fledged GUI-based solution.
Interesting setup! Personally, I would be cautious to use such a screenshot service though. Even if self-hosted, it could screenshot credentials, environment files, and my password manager for example, which would then be stored in plaintext somewhere?
So I would rather prefer to "keep control" by using a search utility when needed instead of scanning the background permanently.
Using Bogrep, I could only find https://tenderowl.com/work/frog/ in my bookmarks which is a bit related, but doesn't seem to be what you're looking for.