Document collection was merged into Work during the "SANS_DOCUMENT"
migration. Updated all handlers to use Work instead:
- get_document_handler: queries Work by sourceId
- list_documents_handler: queries Work directly
- filter_by_author_handler: simplified to use Work only
- delete_document_handler: deletes from Work
Work now contains: title, author, year, language, genre, sourceId,
pages, edition (all formerly in Document)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
David Blanc Brioir
c529ab617a