Federated multi-search metadata mirrored from Meilisearch's federation object.
All fields use snake_case; nil means the backend omitted the value.
Summary
Types
@type t() :: %Scrypath.MultiSearchResult.Federation{ estimated_total_hits: non_neg_integer() | nil, limit: non_neg_integer() | nil, offset: non_neg_integer() | nil, processing_time_ms: non_neg_integer() | nil }