chore: wrap AddReportBehavior with #if WINDOWS directive

EnvelopeGenerator.Application/DependencyInjection.cs

@@ -87,7 +87,9 @@ public static class DependencyInjection
         services.AddMediatR(cfg =>
         {
             cfg.RegisterServicesFromAssembly(Assembly.GetExecutingAssembly());
+#if WINDOWS
             cfg.AddBehavior<AddReportBehavior>();
+#endif
             cfg.AddBehavior<SavePdfBehavior>();
             cfg.AddBehavior<CreateHistoryBehavior>();
         });