refactor(tests): 更新CqrsCoroutineExtensionsTests中的命名空间引用

- 添加GFramework.Core.Coroutine.Extensions命名空间引用
- 保持现有测试功能完整性
- 优化代码结构以匹配最新框架变更

GFramework.Cqrs.Tests/Coroutine/CqrsCoroutineExtensionsTests.cs

@@ -14,6 +14,7 @@
 using GFramework.Core.Abstractions.Architectures;
 using GFramework.Core.Abstractions.Coroutine;
 using GFramework.Core.Abstractions.Rule;
+using GFramework.Core.Coroutine.Extensions;
 using GFramework.Cqrs.Abstractions.Cqrs;
 
 namespace GFramework.Cqrs.Tests.Coroutine;