## Description Add predefined sorting options to the GraphQL `artworks` query for title and artist, in ascending and descending order. ## Done when - [x] Artworks can be sorted by title A–Z and Z–A. - [x] Artworks can be sorted by artist A–Z and Z–A. - [x] Sorting applies to the full matching dataset before pagination. - [x] A unique secondary field ensures stable ordering when values are equal. - [x] Sorting works together with search and filtering. - [x] Queries without a sorting argument use a defined default order. - [x] API tests verify sorting across multiple pages.