fix(notify): 根治低带宽控制面阻塞与传输写入卡死

- 为控制消息增加优先级、公平调度、队列字节预算和自适应批处理
- 支持可取消的写门等待，收紧 shared/dedicated bulk、stream 和 Reply 写入边界
- 修复 bulk reset/close、连接 handoff 和安全 profile 切换时序
- 保留旧取消与超时错误契约，新增阶段化 TransportSendError
- 增加 ReplyCtx、ReplyObjCtx、写超时配置及黑洞连接和竞态回归测试

stream_test.go

@@ -162,6 +162,48 @@ func TestStreamCloseWriteKeepsReadSideAliveTCP(t *testing.T) {
 	waitForStreamContextDone(t, stream.Context(), 2*time.Second)
 }
 
+func TestStreamCloseAndResetHonorWriteTimeout(t *testing.T) {
+	newBlockingStream := func(t *testing.T) *streamHandle {
+		t.Helper()
+		return newStreamHandle(context.Background(), newStreamRuntime("stream-control-timeout"), clientFileScope(), StreamOpenRequest{
+			StreamID:     "stream-control-timeout",
+			WriteTimeout: 30 * time.Millisecond,
+		}, 0, nil, nil, 0,
+			func(ctx context.Context, _ *streamHandle, _ bool) error {
+				<-ctx.Done()
+				return ctx.Err()
+			},
+			func(ctx context.Context, _ *streamHandle, _ string) error {
+				<-ctx.Done()
+				return ctx.Err()
+			}, nil, streamConfig{})
+	}
+
+	t.Run("close", func(t *testing.T) {
+		stream := newBlockingStream(t)
+		started := time.Now()
+		err := stream.Close()
+		if !errors.Is(err, context.DeadlineExceeded) {
+			t.Fatalf("Close error = %v, want context deadline exceeded", err)
+		}
+		if elapsed := time.Since(started); elapsed > time.Second {
+			t.Fatalf("Close remained blocked for %s", elapsed)
+		}
+	})
+
+	t.Run("reset", func(t *testing.T) {
+		stream := newBlockingStream(t)
+		started := time.Now()
+		err := stream.Reset(errors.New("reset"))
+		if !errors.Is(err, context.DeadlineExceeded) {
+			t.Fatalf("Reset error = %v, want context deadline exceeded", err)
+		}
+		if elapsed := time.Since(started); elapsed > time.Second {
+			t.Fatalf("Reset remained blocked for %s", elapsed)
+		}
+	})
+}
+
 func TestStreamCloseFullStopsPeerWritesTCP(t *testing.T) {
 	server := NewServer().(*ServerCommon)
 	if err := UseModernPSKServer(server, integrationSharedSecret, integrationModernPSKOptions()); err != nil {