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

client_session_route.go

@@ -0,0 +1,108 @@
+package notify
+
+import "context"
+
+// clientSessionRoute pins a send or inbound dispatch to one physical client
+// transport. The logical client session can survive a transport reattach, so
+// the epoch alone is not sufficient to prevent an old operation from crossing
+// onto the replacement connection.
+type clientSessionRoute struct {
+	runtime          *clientSessionRuntime
+	binding          *transportBinding
+	epoch            uint64
+	sessionStopCtx   context.Context
+	transportStopCtx context.Context
+}
+
+func clientSessionRouteFromRuntime(rt *clientSessionRuntime) clientSessionRoute {
+	if rt == nil {
+		return clientSessionRoute{}
+	}
+	transportStopCtx := rt.transportStopCtx
+	if transportStopCtx == nil {
+		transportStopCtx = rt.stopCtx
+	}
+	return clientSessionRoute{
+		runtime:          rt,
+		binding:          rt.transport,
+		epoch:            rt.epoch,
+		sessionStopCtx:   rt.stopCtx,
+		transportStopCtx: transportStopCtx,
+	}
+}
+
+func clientSessionRouteContext(route clientSessionRoute) context.Context {
+	if route.transportStopCtx != nil {
+		return route.transportStopCtx
+	}
+	return route.sessionStopCtx
+}
+
+func sameClientSessionRoute(left, right clientSessionRoute) bool {
+	if left.runtime != nil || right.runtime != nil {
+		return left.runtime != nil && left.runtime == right.runtime
+	}
+	if left.binding != nil || right.binding != nil {
+		return left.binding != nil && left.binding == right.binding &&
+			(left.epoch == 0 || right.epoch == 0 || left.epoch == right.epoch)
+	}
+	return left.epoch != 0 && left.epoch == right.epoch
+}
+
+func (r clientSessionRoute) bound() bool {
+	return r.binding != nil || r.epoch != 0
+}
+
+func (r clientSessionRoute) inboundQueueKey() interface{} {
+	if r.binding != nil {
+		return r.binding
+	}
+	return "b612"
+}
+
+func (c *ClientCommon) clientSessionRouteSnapshot() clientSessionRoute {
+	if c == nil {
+		return clientSessionRoute{}
+	}
+	return clientSessionRouteFromRuntime(c.clientSessionRuntimeSnapshot())
+}
+
+func (c *ClientCommon) clientSessionRouteCurrent(route clientSessionRoute) bool {
+	if c == nil {
+		return false
+	}
+	if !route.bound() {
+		return true
+	}
+	current := c.clientSessionRuntimeSnapshot()
+	if current == nil {
+		return false
+	}
+	if route.epoch != 0 && current.epoch != route.epoch {
+		return false
+	}
+	return route.binding != nil && current.transport == route.binding
+}
+
+func (c *ClientCommon) ensureClientSessionRouteSendReady(route clientSessionRoute) error {
+	if err := c.ensureClientSendReady(); err != nil {
+		return err
+	}
+	if !c.clientSessionRouteCurrent(route) {
+		return transportDetachedSessionEpochError()
+	}
+	if route.transportStopCtx != nil {
+		select {
+		case <-route.transportStopCtx.Done():
+			if route.sessionStopCtx != nil && route.sessionStopCtx.Err() != nil {
+				return errServiceShutdown
+			}
+			return transportDetachedSessionEpochError()
+		default:
+		}
+	}
+	if route.binding == nil {
+		return clientTransportDetachedError(c)
+	}
+	return nil
+}