GET/PUT /api/settings/{ffmpeg,playout,xmltv,scanner,logging,ui,hdhr}
wrapping the existing MediatR settings handlers, plus custom resolution
list/create/delete under /api/settings/resolutions. String-enum OpenAPI
schemas extended to OutputFormatKind + LogEventLevel.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>