fix(logging): 修复异步日志追加器中的操作取消异常处理

- 添加对 OperationCanceledException 的特殊处理，避免将其报告为后台处理错误
- 在 ReportProcessingError 方法中检查并过滤掉操作取消异常
- 添加单元测试验证当内部追加器抛出 OperationCanceledException 时不报告错误
- 创建 CancellationAppender 测试辅助类来模拟取消异常场景
- 确保取消相关的异常不会触发错误处理逻辑

GFramework.Core.Tests/Logging/AsyncLogAppenderTests.cs

@@ -1,4 +1,3 @@
-using GFramework.Core.Abstractions.Logging;
 using GFramework.Core.Logging.Appenders;
 
 namespace GFramework.Core.Tests.Logging;
@@ -197,6 +196,29 @@ public class AsyncLogAppenderTests
         Assert.That(asyncAppender.Flush(), Is.True);
     }
 
+    [Test]
+    public void Append_WhenInnerAppenderThrowsOperationCanceledException_ShouldNotReportError()
+    {
+        var reportedExceptions = new List<Exception>();
+        var innerAppender = new CancellationAppender();
+        using var asyncAppender = new AsyncLogAppender(
+            innerAppender,
+            bufferSize: 1000,
+            processingErrorHandler: reportedExceptions.Add);
+
+        Assert.DoesNotThrow(() =>
+        {
+            for (int i = 0; i < 10; i++)
+            {
+                var entry = new LogEntry(DateTime.UtcNow, LogLevel.Info, "TestLogger", $"Message {i}", null, null);
+                asyncAppender.Append(entry);
+            }
+        });
+
+        Assert.That(asyncAppender.Flush(), Is.True);
+        Assert.That(reportedExceptions, Is.Empty);
+    }
+
     // 辅助测试类
     private class TestAppender : ILogAppender
     {
@@ -257,4 +279,20 @@ public class AsyncLogAppenderTests
         {
         }
     }
+
+    private class CancellationAppender : ILogAppender
+    {
+        public void Append(LogEntry entry)
+        {
+            throw new OperationCanceledException("Simulated cancellation");
+        }
+
+        public void Flush()
+        {
+        }
+
+        public void Dispose()
+        {
+        }
+    }
 }

GFramework.Core/Logging/Appenders/AsyncLogAppender.cs

@@ -1,4 +1,3 @@
-using System.Threading.Channels;
 using GFramework.Core.Abstractions.Logging;
 
 namespace GFramework.Core.Logging.Appenders;
@@ -212,10 +211,16 @@ public sealed class AsyncLogAppender : ILogAppender
 
     /// <summary>
     ///     上报后台处理异常，同时隔离观察者自身抛出的错误，避免终止处理循环。
+    ///     取消相关异常表示关闭流程中的预期控制流，不应被视为后台处理失败。
     /// </summary>
     /// <param name="exception">后台处理中捕获到的异常。</param>
     private void ReportProcessingError(Exception exception)
     {
+        if (exception is OperationCanceledException)
+        {
+            return;
+        }
+
         if (_processingErrorHandler is null)
         {
             return;