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

peer_attach_test_helper_test.go

@@ -0,0 +1,55 @@
+package notify
+
+import (
+	"b612.me/stario"
+	"context"
+	"fmt"
+	"math"
+	"net"
+	"sync/atomic"
+	"testing"
+)
+
+var testAcceptedPeerSeq atomic.Uint64
+
+func newRunningPeerAttachServerForTest(t *testing.T, configure func(*ServerCommon)) *ServerCommon {
+	t.Helper()
+	server := NewServer().(*ServerCommon)
+	if configure != nil {
+		configure(server)
+	}
+	stopCtx, stopFn := context.WithCancel(context.Background())
+	queue := stario.NewQueueCtx(stopCtx, 8, math.MaxUint32)
+	server.setServerSessionRuntime(&serverSessionRuntime{
+		stopCtx: stopCtx,
+		stopFn:  stopFn,
+		queue:   queue,
+	})
+	server.markSessionStarted()
+
+	transportCtx, transportStop := context.WithCancel(context.Background())
+	go server.loadMessageLoop(nil, transportCtx, queue, nil, nil)
+
+	t.Cleanup(func() {
+		transportStop()
+		stopFn()
+	})
+	return server
+}
+
+func bootstrapPeerAttachLogicalForTest(t *testing.T, server *ServerCommon, conn net.Conn) *LogicalConn {
+	t.Helper()
+	if server == nil {
+		t.Fatal("server is nil")
+	}
+	id := fmt.Sprintf("accepted-%d", testAcceptedPeerSeq.Add(1))
+	logical := server.bootstrapAcceptedLogical(id, conn.RemoteAddr(), conn)
+	if logical == nil {
+		t.Fatal("bootstrapAcceptedLogical returned nil")
+	}
+	return logical
+}
+
+func bootstrapPeerAttachConnForTest(t *testing.T, server *ServerCommon, conn net.Conn) *ClientConn {
+	return clientConnFromLogical(bootstrapPeerAttachLogicalForTest(t, server, conn))
+}