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

security_profile.go

@@ -211,6 +211,22 @@ func (c *ClientCommon) setClientTransportProtectionProfile(profile transportProt
 	c.transportProtection.Store(&profile)
 }
 
+func (c *ClientCommon) installInboundTransitionProfile(profile transportProtectionProfile) *transportProtectionProfile {
+	if c == nil {
+		return nil
+	}
+	next := profile.clone()
+	c.inboundTransitionProfile.Store(&next)
+	return &next
+}
+
+func (c *ClientCommon) clearInboundTransitionProfile(expected *transportProtectionProfile) {
+	if c == nil || expected == nil {
+		return
+	}
+	c.inboundTransitionProfile.CompareAndSwap(expected, nil)
+}
+
 func (c *ClientCommon) clearClientSecurityProfiles() {
 	if c == nil {
 		return
@@ -247,6 +263,7 @@ func (c *ClientCommon) activateClientBootstrapTransportProtection() {
 	if c == nil || !c.securityConfigured {
 		return
 	}
+	c.inboundTransitionProfile.Store(nil)
 	c.resetClientNegotiatedSteadyTransportProtection()
 	c.setClientTransportProtectionProfile(c.securityBootstrap)
 }
@@ -406,3 +423,19 @@ func (c *LogicalConn) applyTransportProtectionProfile(profile transportProtectio
 		state.forwardSecrecyFallback = profile.forwardSecrecyFallback
 	})
 }
+
+func (c *LogicalConn) installInboundTransitionProfile(profile transportProtectionProfile) *transportProtectionProfile {
+	if c == nil {
+		return nil
+	}
+	next := profile.clone()
+	c.inboundTransitionProfile.Store(&next)
+	return &next
+}
+
+func (c *LogicalConn) clearInboundTransitionProfile(expected *transportProtectionProfile) {
+	if c == nil || expected == nil {
+		return
+	}
+	c.inboundTransitionProfile.CompareAndSwap(expected, nil)
+}