security(web): secure Hangfire Dashboard with cookie authentication filter

src/dotnet/QuantEngine.Web/Services/SchedulerService.cs

@@ -328,8 +328,7 @@ public class HangfireAuthorizationFilter : IDashboardAuthorizationFilter
 {
     public bool Authorize(DashboardContext context)
     {
-        // TODO: Implement proper authorization check
+        var httpContext = context.GetHttpContext();
-        // For now, allow all in development
+        return httpContext.User.Identity?.IsAuthenticated == true;
-        return true;
     }
 }