Probably not relevant anymore, but this might help someone who runs into the same issue.
There’s likely better tooling out there by now, but for what it’s worth:

I recently built a library that solves this exact problem.
It’s called JDAE (Java Dynamic Annotation Expansion), an open source metaprogramming library that lets you expand (process and replace) annotations dynamically at build time.
You can check it out here: https://github.com/Relism/JDAE