feat(roadblock): carry blocks through RunResult

src/ClaudeDo.Worker/Runner/RunResult.cs

@@ -10,6 +10,7 @@ public sealed class RunResult
     public int TurnCount { get; init; }
     public int TokensIn { get; init; }
     public int TokensOut { get; init; }
+    public IReadOnlyList<string> Blocks { get; init; } = Array.Empty<string>();
 
     public bool IsSuccess => ExitCode == 0 && ResultMarkdown is not null;
 }