Add opt-in FFmpeg continuity slates with per-viewer localization

Tests/Program.cs

@@ -18,6 +18,7 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.DependencyInjection;
+if (args.Length == 3 && (args[0] == "--continuity-e2e" || args[0] == "--long-continuity-e2e")) { await ContinuityE2E.Run(args[1], args[2], args[0].StartsWith("--long")); return; }
 var time=DateTime.UtcNow;
 void Check(bool ok,string name){if(!ok)throw new Exception(name);Console.WriteLine("PASS "+name);}
 ChannelReferenceTests.Run(Check);
@@ -126,6 +127,8 @@ using(var relay=new LiveStreamRelay(new System.Net.Http.HttpClient(relayHandler)
 }
 await SavedChannelPlaybackTests.Run(Check);
 await ChannelSyncTests.Run(Check);
+await PlaybackFeedbackTests.Run(Check);
+ContinuityTests.Run(Check);
 public class PathsProxy : DispatchProxy
 {
  public string Folder;