Looks like a new maintainer with the necessary C++ experience needs to fork it. Probably a case for nostr:npub10pensatlcfwktnvjjw2dtem38n6rvw8g6fv73h84cuacxn4c28eqyfn34f to support?

Also, a bus factor of 1 is not great for the software that powers most nostr relays. A fork should probably go to a community namespace/repo to begin with.