Integrating ahnlich with Postgres

In a bid for interoperability with existing systems that use Postgres, we would like ahnlich to potentially be called as a server.

I'm open to suggestions of other ways to do this but one that immediately comes to mind is Foreign Data Wrappers. If we leverage [supabase's wrappers](https://github.com/supabase/wrappers), we can sculpt a simple FDW that let's us integrate into the postgres ecosystem