> To facilitate quick note taking I wrote a FUSE driver for it
I didn't understand this part. Why can't you just write the file and then either manually/automatically trigger an import of the text into the SQLiteDB?
The fuse FS (which, fuse not at all difficult to use, there are many implementations of SQLite-backed fs) implements the trigger that automatically imports it.
Could have used NFS or something to achieve what you've suggested, but this is the path I went down and seems to work ok for my needs.