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

logical_conn.go

@@ -9,14 +9,15 @@ import (
 )
 
 type LogicalConn struct {
-	client         *ClientConn
-	server         Server
-	ClientID       string
-	ClientAddr     net.Addr
-	state          atomic.Pointer[logicalConnState]
-	runtime        atomic.Pointer[logicalConnRuntimeState]
-	transportState atomic.Pointer[clientConnTransportState]
-	attachment     atomic.Pointer[clientConnAttachmentState]
+	client                   *ClientConn
+	server                   Server
+	ClientID                 string
+	ClientAddr               net.Addr
+	state                    atomic.Pointer[logicalConnState]
+	runtime                  atomic.Pointer[logicalConnRuntimeState]
+	transportState           atomic.Pointer[clientConnTransportState]
+	attachment               atomic.Pointer[clientConnAttachmentState]
+	inboundTransitionProfile atomic.Pointer[transportProtectionProfile]
 }
 
 var errLogicalConnClientNil = errors.New("logical conn is nil")
@@ -856,6 +857,10 @@ func (c *LogicalConn) sessionRuntimeSnapshot() *clientConnSessionRuntime {
 }
 
 func (c *LogicalConn) setSessionRuntime(rt *clientConnSessionRuntime) {
+	c.setSessionRuntimeWithCloseOld(rt, false)
+}
+
+func (c *LogicalConn) setSessionRuntimeWithCloseOld(rt *clientConnSessionRuntime, closeOld bool) {
 	if c == nil || rt == nil {
 		return
 	}
@@ -883,7 +888,7 @@ func (c *LogicalConn) setSessionRuntime(rt *clientConnSessionRuntime) {
 		client.syncLegacySessionRuntimeFromState(state)
 	}
 	if oldBinding != nil {
-		oldBinding.stopBackgroundWorkers()
+		stopReplacedTransportBinding(oldBinding, rt.transport, closeOld)
 	}
 }
 
@@ -982,14 +987,14 @@ func (c *LogicalConn) startSession(tuConn net.Conn, stopCtx context.Context, sto
 		transportGeneration = c.markTransportAttached()
 		c.clearTransportDetachState()
 	}
-	c.setSessionRuntime(&clientConnSessionRuntime{
+	c.setSessionRuntimeWithCloseOld(&clientConnSessionRuntime{
 		transport:           newTransportBinding(tuConn, nil),
 		transportAttached:   tuConn != nil,
 		transportGeneration: transportGeneration,
 		tuConn:              tuConn,
 		stopCtx:             stopCtx,
 		stopFn:              stopFn,
-	})
+	}, true)
 	c.markSessionStarted()
 	return stopCtx, stopFn
 }
@@ -1030,7 +1035,7 @@ func (c *LogicalConn) attachSessionTransport(tuConn net.Conn) error {
 	next.transportStopCtx = nil
 	next.transportStopFn = nil
 	next.transportDone = nil
-	c.setSessionRuntime(&next)
+	c.setSessionRuntimeWithCloseOld(&next, true)
 	if tuConn.RemoteAddr() != nil {
 		c.setRemoteAddr(tuConn.RemoteAddr())
 	}