feat(notify): 重构通信内核并补齐 stream/bulk/record/transfer 能力

- 引入 LogicalConn/TransportConn 分层，ClientConn 保留兼容适配层
  - 新增 Stream、Bulk、RecordStream 三条数据面能力及对应控制路径
  - 完成 transfer/file 传输内核与状态快照、诊断能力
  - 补齐 reconnect、inbound dispatcher、modern psk 等基础模块
  - 增加大规模回归、并发与基准测试覆盖
  - 更新依赖库

client_conn_session.go

@@ -0,0 +1,112 @@
+package notify
+
+import (
+	"context"
+	"errors"
+	"net"
+)
+
+func (c *ClientConn) startClientConnSession(tuConn net.Conn, stopCtx context.Context, stopFn context.CancelFunc) (context.Context, context.CancelFunc) {
+	if c == nil {
+		return stopCtx, stopFn
+	}
+	return c.LogicalConn().startSession(tuConn, stopCtx, stopFn)
+}
+
+func (c *ClientConn) startClientConnSessionTransport(tuConn net.Conn, stopCtx context.Context, stopFn context.CancelFunc) (context.Context, context.CancelFunc) {
+	if c == nil {
+		return stopCtx, stopFn
+	}
+	return c.LogicalConn().startSessionTransport(tuConn, stopCtx, stopFn)
+}
+
+func (c *ClientConn) attachClientConnSessionTransport(tuConn net.Conn) error {
+	if c == nil {
+		return errors.New("client conn is nil")
+	}
+	return c.LogicalConn().attachSessionTransport(tuConn)
+}
+
+func (c *ClientConn) detachClientConnTransportForTransfer() (net.Conn, error) {
+	if c == nil {
+		return nil, errors.New("client conn is nil")
+	}
+	return c.LogicalConn().detachTransportForTransfer()
+}
+
+func (c *ClientConn) stopServerOwnedSession(reason string, err error) {
+	c.stopServerOwnedSessionWith(nil, reason, err)
+}
+
+func (c *LogicalConn) stopServerOwnedSession(reason string, err error) {
+	c.stopServerOwnedSessionWith(nil, reason, err)
+}
+
+func (c *ClientConn) stopServerOwnedSessionWith(removeFn func(*ClientConn), reason string, err error) {
+	if c == nil {
+		return
+	}
+	c.markSessionStopped(reason, err)
+	c.detachServerOwnedSessionWith(removeFn)
+}
+
+func (c *LogicalConn) stopServerOwnedSessionWith(removeFn func(*LogicalConn), reason string, err error) {
+	client := c.compatClientConn()
+	if client == nil {
+		return
+	}
+	client.markSessionStopped(reason, err)
+	c.detachServerOwnedSessionWith(removeFn)
+}
+
+func (c *ClientConn) detachServerOwnedSession() {
+	c.detachServerOwnedSessionWith(nil)
+}
+
+func (c *LogicalConn) detachServerOwnedSession() {
+	c.detachServerOwnedSessionWith(nil)
+}
+
+func (c *ClientConn) detachServerOwnedSessionWith(removeFn func(*ClientConn)) {
+	if c == nil {
+		return
+	}
+	c.detachServerOwnedTransport()
+	if removeFn != nil {
+		removeFn(c)
+		return
+	}
+	if c.server != nil {
+		c.server.removeClient(c)
+	}
+}
+
+func (c *LogicalConn) detachServerOwnedSessionWith(removeFn func(*LogicalConn)) {
+	client := c.compatClientConn()
+	if client == nil {
+		return
+	}
+	c.detachServerOwnedTransport()
+	if removeFn != nil {
+		removeFn(c)
+		return
+	}
+	if client.server != nil {
+		client.server.removeLogical(c)
+	}
+}
+
+func (c *ClientConn) detachServerOwnedTransport() {
+	if c == nil {
+		return
+	}
+	c.LogicalConn().detachServerOwnedTransport()
+}
+
+func (c *LogicalConn) detachServerOwnedTransport() {
+	if c == nil {
+		return
+	}
+	c.closeTransport()
+	c.clearSessionRuntimeTransport()
+}