refactor(cqrs): 简化接口定义并分离流式命令和查询接口

- 移除 ICommand<TResponse> 和 ICommand 的空实现体
- 移除 IQuery<TResponse> 和 IStreamQuery<TResponse> 的空实现体
- 移除 INotification、IRequest<TResponse>、IStreamRequest<TResponse> 的空实现体
- 将 IStreamCommand<TResponse> 分离到独立文件中
- 将 IStreamQuery<TResponse> 分离到独立文件中
- 保持所有接口的核心功能不变，仅简化语法结构

GFramework.Cqrs.Abstractions/Cqrs/Command/ICommand.cs

@@ -5,21 +5,9 @@ namespace GFramework.Cqrs.Abstractions.Cqrs.Command;
 ///     命令通常用于修改系统状态。
 /// </summary>
 /// <typeparam name="TResponse">命令响应类型。</typeparam>
-public interface ICommand<out TResponse> : IRequest<TResponse>
-{
-}
+public interface ICommand<out TResponse> : IRequest<TResponse>;
 
 /// <summary>
 ///     表示一个无显式返回值的 CQRS 命令。
 /// </summary>
-public interface ICommand : ICommand<Unit>
-{
-}
-
-/// <summary>
-///     表示一个流式 CQRS 命令。
-/// </summary>
-/// <typeparam name="TResponse">流式响应元素类型。</typeparam>
-public interface IStreamCommand<out TResponse> : IStreamRequest<TResponse>
-{
-}
+public interface ICommand : ICommand<Unit>;

GFramework.Cqrs.Abstractions/Cqrs/Command/IStreamCommand.cs

@@ -0,0 +1,20 @@
+// Copyright (c) 2026 GeWuYou
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// 
+//     http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+namespace GFramework.Cqrs.Abstractions.Cqrs.Command;
+
+/// <summary>
+///     表示一个流式 CQRS 命令。
+/// </summary>
+/// <typeparam name="TResponse">流式响应元素类型。</typeparam>
+public interface IStreamCommand<out TResponse> : IStreamRequest<TResponse>;

GFramework.Cqrs.Abstractions/Cqrs/INotification.cs

@@ -4,6 +4,4 @@ namespace GFramework.Cqrs.Abstractions.Cqrs;
 ///     表示一个一对多发布的通知消息。
 ///     通知不要求返回值，允许被零个或多个处理器消费。
 /// </summary>
-public interface INotification
-{
-}
+public interface INotification;

GFramework.Cqrs.Abstractions/Cqrs/IRequest.cs

@@ -5,6 +5,4 @@ namespace GFramework.Cqrs.Abstractions.Cqrs;
 ///     该接口是命令、查询以及其他请求语义的统一基接口。
 /// </summary>
 /// <typeparam name="TResponse">请求响应类型。</typeparam>
-public interface IRequest<out TResponse>
-{
-}
+public interface IRequest<out TResponse>;

GFramework.Cqrs.Abstractions/Cqrs/IStreamRequest.cs

@@ -5,6 +5,4 @@ namespace GFramework.Cqrs.Abstractions.Cqrs;
 ///     请求处理器可以逐步产生响应序列，而不是一次性返回完整结果。
 /// </summary>
 /// <typeparam name="TResponse">流式响应元素类型。</typeparam>
-public interface IStreamRequest<out TResponse>
-{
-}
+public interface IStreamRequest<out TResponse>;

GFramework.Cqrs.Abstractions/Cqrs/Query/IQuery.cs

@@ -5,14 +5,4 @@ namespace GFramework.Cqrs.Abstractions.Cqrs.Query;
 ///     查询用于读取数据，不应产生副作用。
 /// </summary>
 /// <typeparam name="TResponse">查询响应类型。</typeparam>
-public interface IQuery<out TResponse> : IRequest<TResponse>
-{
-}
-
-/// <summary>
-///     表示一个流式 CQRS 查询。
-/// </summary>
-/// <typeparam name="TResponse">流式响应元素类型。</typeparam>
-public interface IStreamQuery<out TResponse> : IStreamRequest<TResponse>
-{
-}
+public interface IQuery<out TResponse> : IRequest<TResponse>;

GFramework.Cqrs.Abstractions/Cqrs/Query/IStreamQuery.cs

@@ -0,0 +1,20 @@
+// Copyright (c) 2026 GeWuYou
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// 
+//     http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+namespace GFramework.Cqrs.Abstractions.Cqrs.Query;
+
+/// <summary>
+///     表示一个流式 CQRS 查询。
+/// </summary>
+/// <typeparam name="TResponse">流式响应元素类型。</typeparam>
+public interface IStreamQuery<out TResponse> : IStreamRequest<TResponse>;