Ah, those appear to be entirely multi-device-sync problems. (I use logseq with git-autocommit for storage and backup - but since the multi-node sync stuff wasn't available for self hosting anyway, I've never tried it, and thus dodged the problem entirely. Obviously for a lot of people multi-device use is the entire point, but for some of us, logseq is "just an editor"...)
I actually do something like this with my logseq notes. Since all of the files are .md in a directory, one can load them all in to a vectordb and use it for RAG. Logseq has an API too but using the .md files is easy.