are Data repositories discoverable?

[gavinking]

Currently we say:

A class is considered eligible for generation of a metamodel class if it **belongs to the persistence unit** and:

• it is annotated with a discoverable annotation type, or
• it has a method annotated with one of the two static query annotations,
  @StaticQuery or @StaticNativeQuery.

And:

The set of types **belonging to a persistence unit** is determined by:

• classes bearing discoverable annotation types located in the root of the
  persistence unit (unless <exclude-unlisted-classes/> is specified);
• one or more object/relational mapping XML files;
• one or more JAR files to be searched for classes;
• an explicit list of classes.

So a Jakarta Data repository does not "belong to the persistence unit" unless it's explicitly listed in persistence.xml or in an orm.xml, and therefore we are not required to generate a static metamodel for it, meaning it's @StaticQuery and @StaticNativeQuery annotations have no representation in the metamodel.

One fix would be to simply assert that @Repository is considered @Discoverable ... even though it's not annotated as such.

Also I think we should add Jakarta Data's @Query to the list of "static query annotations".