Note Mark: Unauthenticated read of notes and assets in soft-deleted public books

Note Mark is an open-source note-taking application. Prior to version 0.19.3, after a note-mark owner soft-deletes a public book, its notes and uploaded assets stay readable at /api/notes/{id}, /api/notes/{id}/content, the slug URL, and the asset endpoints. Unauthenticated callers who hold the note ID or the slug path retain access. GORM's soft-delete scope does not reach the raw "JOIN books ..." clauses used by the note and asset queries. This issue has been patched in version 0.19.3.