Add Role based grain placement

src/Managing.Application/Scenarios/ScenarioRunnerGrain.cs

@@ -1,4 +1,5 @@
 using Managing.Application.Abstractions.Grains;
+using Managing.Application.Orleans;
 using Managing.Core;
 using Managing.Domain.Bots;
 using Managing.Domain.Candles;
@@ -14,8 +15,10 @@ namespace Managing.Application.Scenarios;
 /// <summary>
 /// Orleans grain for scenario execution and signal generation.
 /// This stateless grain handles candle management and signal generation for live trading.
+/// Uses custom trading placement with load balancing and built-in fallback.
 /// </summary>
 [StatelessWorker]
+[TradingPlacement] // Use custom trading placement with load balancing
 public class ScenarioRunnerGrain : Grain, IScenarioRunnerGrain
 {
     private readonly ILogger<ScenarioRunnerGrain> _logger;