Refactor Audits API endpoints to DTO

[Viktor Pavlenko]

We have some, i think, deprecated response in Audits API in GET /v1/audits
endpoint and our response depends on the query param like "paged".. When we
have "paged" is true we'll have a pageable response but if "paged" false
it'll be List<>. Therefore, it's impossible to refactor a normal struct
with use dto.. Probably, one of the type is deprecated yet and needs to
only use Page<> response, and we can easier remove List<>?