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_record.go

@@ -0,0 +1,66 @@
+package notify
+
+import "context"
+
+func (c *ClientCommon) SetRecordStreamHandler(fn func(RecordAcceptInfo) error) {
+	runtime := c.getRecordRuntime()
+	if runtime == nil {
+		return
+	}
+	runtime.setHandler(fn)
+}
+
+func (c *ClientCommon) OpenRecordStream(ctx context.Context, opt RecordOpenOptions) (RecordStream, error) {
+	if c == nil {
+		return nil, errStreamClientNil
+	}
+	opt = normalizeRecordOpenOptions(opt)
+	stream, err := c.OpenStream(ctx, opt.Stream)
+	if err != nil {
+		return nil, err
+	}
+	record, err := WrapStreamAsRecord(stream, opt)
+	if err != nil {
+		_ = stream.Reset(err)
+		return nil, err
+	}
+	return record, nil
+}
+
+func (c *ClientCommon) claimInboundRecordStream(stream *streamHandle) (bool, error) {
+	if stream == nil || stream.Channel() != StreamRecordChannel {
+		return false, nil
+	}
+	runtime := c.getRecordRuntime()
+	if runtime == nil {
+		return true, errRecordRuntimeNil
+	}
+	handler := runtime.handlerSnapshot()
+	if handler == nil {
+		return true, errRecordHandlerNotConfigured
+	}
+	record, err := WrapStreamAsRecord(stream, RecordOpenOptions{
+		Stream: StreamOpenOptions{
+			ID:           stream.ID(),
+			Channel:      stream.Channel(),
+			Metadata:     stream.Metadata(),
+			ReadTimeout:  stream.readTimeoutSnapshot(),
+			WriteTimeout: stream.writeTimeoutSnapshot(),
+		},
+	})
+	if err != nil {
+		return true, err
+	}
+	info := RecordAcceptInfo{
+		ID:                  stream.ID(),
+		Metadata:            stream.Metadata(),
+		TransportGeneration: stream.TransportGeneration(),
+		RecordStream:        record,
+	}
+	go func() {
+		if err := handler(info); err != nil {
+			_ = record.Reset(err)
+		}
+	}()
+	return true, nil
+}