Improve documentation to reveal which artifact provides which configuration property

I'm using Spring Modulith 1.3.5 with Spring Data JPA and postgresql 16. I'm seeing issues with these two settings:

• spring.modulith.events.jdbc.schema-initialization.enabled
• spring.modulith.events.jdbc.schema

Neither property appears in Intellij Idea's completion suggestions, which suggests to me they're not defined when Spring Data JPA is in use.

Also, when I try to put Spring Modulith's tables inside a custom database schema named modulith and set spring.modulith.events.jdbc.schema to that value, I see this error:

Schema-validation: missing table [event_publication]

which likewise suggests that Spring Modulith is not using the defined schema value i.e. it's still looking in the public schema rather than the intended modulith schema.