feat: migrate legacy playout workflow and scenes

tests/MBN_STOCK_WEBVIEW.Playout.Tests/PgmCutsSequenceRunnerTests.cs

@@ -93,6 +93,7 @@ public sealed class PgmCutsSequenceRunnerTests
         Assert.Equal(30_001, plan.Options.Port);
         Assert.Null(plan.Options.OutputChannel);
         Assert.Equal(10, plan.Options.LayoutIndex);
+        Assert.Equal(["5001", "5006"], plan.Options.TestSceneAllowlist);
         Assert.True(plan.Options.TrustedLiveOutputEnabled);
         Assert.False(plan.Options.ReconnectEnabled);
         Assert.Equal(0, plan.Options.MaximumReconnectAttempts);
@@ -825,6 +826,19 @@ public sealed class PgmCutsSequenceRunnerTests
             return Result(PgmCutsSequenceStage.Next, PlayoutOperation.Next);
         }
 
+        public Task<PlayoutResult> UpdateOnAirAsync(
+            PlayoutCue cue,
+            CancellationToken cancellationToken = default)
+        {
+            _events.Enqueue($"UpdateOnAir:{cue.SceneName}");
+            return Task.FromResult(new PlayoutResult(
+                PlayoutOperation.UpdateOnAir,
+                PlayoutResultCode.Success,
+                false,
+                "fake",
+                DateTimeOffset.UnixEpoch));
+        }
+
         public Task<PlayoutResult> TakeOutAsync(
             PlayoutTakeOutScope scope,
             CancellationToken cancellationToken = default)