fix(notify): 修复传输生命周期竞态，完善背压与协议边界

- 完善 stream/bulk DataID 分配、预留和双向命名空间，修复并发打开及 dedicated/shared 回退时的 ID 冲突
- 将收发、回复、恢复任务和 sidecar 绑定原始会话与物理连接，防止重连后的旧消息误操作新连接
- 加强 close/reset 身份校验及实例移除检查，修复 dedicated attach 失败、通道引用和资源回收竞态
- 收紧批量发送器停止准入，确保在途入队完成后统一清理请求、缓冲区和等待者
- 修复 record 满队列死锁、取消时序号消耗及关闭竞态，确保关闭有界并返回真实错误
- 增加协商式 record 逻辑半关闭，保留反向 ACK；通过 reset 传递 RecordFailure，避免背压掩盖原始失败原因
- 补齐帧长度、批次数量、序号溢出和未确认窗口校验，提前拒绝超限数据并按字节预算拆批
- 为入站分发增加全局及单连接的条数、字节预算和阻塞背压，关闭时唤醒等待者，消除正常断连日志噪音
- 完善 bulk 窗口释放失败处理与传输诊断，补充并发、重连、背压、协议边界及真实 TCP 回归覆盖

logical_conn.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"net"
+	"sync"
 	"sync/atomic"
 	"time"
 )
@@ -18,6 +19,7 @@ type LogicalConn struct {
 	transportState           atomic.Pointer[clientConnTransportState]
 	attachment               atomic.Pointer[clientConnAttachmentState]
 	inboundTransitionProfile atomic.Pointer[transportProtectionProfile]
+	transportLifecycleMu     sync.Mutex
 }
 
 var errLogicalConnClientNil = errors.New("logical conn is nil")
@@ -1118,15 +1120,23 @@ func (c *LogicalConn) transportConnSnapshotForInbound(conn net.Conn, remoteAddr
 	}
 
 	attached := false
+	var binding *transportBinding
 	currentGeneration := c.transportGenerationSnapshot()
 	if conn != nil {
-		binding := c.transportBindingSnapshot()
-		if binding != nil && binding.connSnapshot() == conn && c.transportAttachedSnapshot() && currentGeneration == generation {
+		currentBinding := c.transportBindingSnapshot()
+		if currentBinding != nil && currentBinding.connSnapshot() == conn && c.transportAttachedSnapshot() && currentGeneration == generation {
+			binding = currentBinding
 			attached = true
+		} else {
+			// Keep stale inbound replies on the socket that delivered them. This
+			// binding intentionally has no queue/sender state and is never used
+			// by a logical send after IsCurrent rejects the old generation.
+			binding = newTransportBinding(conn, nil)
 		}
 	} else {
 		current := c.CurrentTransportConn()
 		if current != nil && currentGeneration == generation && transportConnAddrString(current.RemoteAddr()) == transportConnAddrString(remoteAddr) {
+			binding = current.binding
 			attached = current.Attached()
 			if !hasRuntimeConn {
 				hasRuntimeConn = current.HasRuntimeConn()
@@ -1138,6 +1148,7 @@ func (c *LogicalConn) transportConnSnapshotForInbound(conn net.Conn, remoteAddr
 		logical:        c,
 		generation:     generation,
 		remoteAddr:     remoteAddr,
+		binding:        binding,
 		attached:       attached,
 		hasRuntimeConn: hasRuntimeConn,
 	}