fix block playout playback when no deco is configured (#1687)

CHANGELOG.md

@@ -46,6 +46,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix `HLS Segmenter V2` segment duration (previously 10s, now 4s)
 - Fix `HLS Segmenter V2` error video generation
 - Fix MySql database migrations
+- Fix block playout playback when no deco is configured
 
 ### Changed
 - Use ffmpeg 7 in all docker images 

ErsatzTV.Application/Streaming/Queries/GetPlayoutItemProcessByChannelNumberHandler.cs

@@ -765,7 +765,8 @@ public class GetPlayoutItemProcessByChannelNumberHandler : FFmpegProcessHandler<
 
         foreach (PlayoutTemplate activeTemplate in maybeActiveTemplate)
         {
-            Option<DecoTemplateItem> maybeItem = activeTemplate.DecoTemplate.Items
+            Option<DecoTemplateItem> maybeItem = Optional(activeTemplate.DecoTemplate)
+                .SelectMany(dt => dt.Items)
                 .Find(i => i.StartTime <= now.TimeOfDay && i.EndTime > now.TimeOfDay);
             foreach (DecoTemplateItem item in maybeItem)
             {