Support adding a key prefix for keyspaces

[uqix]

e.g.

@RedisHash("people")
@Data
class Person {

  @Id String id;
  String firstname;
  String lastname;
  Address address;
}

for this repo, we'd like the key to be some-service::repo::people

[mp911de]

That should actually work already by naming the hash @RedisHash("some-service::repo::people").

[uqix]

Sorry for not being clear, it would be nice to have some global config like spring.cache.redis.key-prefix so that we don't have to repeat the prefix for every repository

[mp911de]

Introducing a PrefixKeyspaceResolver variant and exposing our existing resolvers should be sufficient to implement such a feature.