refactor(vd960Loop): 算法回退到 DLD154V4B，四通道适配

- 用 DLD154V4B vd1_task/per_channel 替换 vds_task 复杂算法
- 移除 FUNCTION_B/二次判断/快速变化/多重确认等增强特性
- 保留平坦性离开算法 (CN200910309382)，每通道独立状态
- 灵敏度表改为 DLD154V4B 4级: {216,108,36,10} / {108,72,18,9}
- 清理废弃类型: FltHistoryManager, Loop_ACS_Info, StageRangeConfig 等
- 首次添加 vd960DBN 完整源码

vd960DBN/BLE/OnlyUpdateApp_IAP/APP/include/ch32v20x_it.h

@@ -0,0 +1,18 @@
+/********************************** (C) COPYRIGHT *******************************
+ * File Name          : ch32v20x_it.h
+ * Author             : WCH
+ * Version            : V1.0.0
+ * Date               : 2022/06/16
+ * Description        : This file contains the headers of the interrupt handlers.
+ *********************************************************************************
+ * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+ * Attention: This software (modified or not) and binary are used for 
+ * microcontroller manufactured by Nanjing Qinheng Microelectronics.
+ *******************************************************************************/
+
+#ifndef __CH32V20x_IT_H
+#define __CH32V20x_IT_H
+
+#include "debug.h"
+
+#endif /* __CH32V20x_IT_H */