fix block playout random seeds (#1703)

CHANGELOG.md

@@ -80,6 +80,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix block playout playback when no deco is configured
 - Fix `HLS Segmenter V2` to delete old segments (use less disk space while channel is active)
 - Fix template and deco template editors to prevent items that go beyond midnight
+- Fix block playout random seeds
+  - Different blocks within a single playout will now correctly use different random seeds (shuffles)
+  - Erasing block playout history will also generate new random seeds for the playout
 
 ### Changed
 - Use ffmpeg 7 in all docker images

ErsatzTV.Core/Scheduling/BlockScheduling/BlockPlayoutEnumerator.cs

@@ -92,7 +92,7 @@ public static class BlockPlayoutEnumerator
             .OrderByDescending(h => h.When)
             .HeadOrNone();
 
-        var state = new CollectionEnumeratorState { Seed = playout.Id, Index = 0 };
+        var state = new CollectionEnumeratorState { Seed = playout.Seed + blockItem.BlockId, Index = 0 };
         foreach (PlayoutHistory h in maybeHistory)
         {
             state.Index = h.Index + 1;