- Introduced `MediaImage` entity to manage images for markdown in instructions and news. - Updated `IAppDbContext` and `AppDbContext` to include `MediaImages` DbSet. - Implemented `DeleteMediaImageFilesAsync` method in `FactoryResetCommandHandler` to remove media images during factory reset. - Added new API endpoints for uploading and retrieving media images, enhancing markdown support. - Updated frontend components to utilize the new `MarkdownEditor` for image uploads in instructions and news. - Enhanced documentation to reflect the new media handling features and API specifications.