debug(vd960DBN): performPeriodicTask 拉包失败打印 resp 状态 + 注释闭合

- 第二分包未进发送函数, 加条件打印 (仅当队列有货但拉包返回0时)
  BLE pull FAIL: resp flag/amt/seq/off 一烧录即知第二包断在哪
- 补 ble_notify_chunk_max 注释块闭合 */

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/dbn_ble_srv.c

@@ -190,6 +190,7 @@ static uint8_t set_net_info_to_ready(uint8_t * dat_dst)
  *   and whole pkt <= MAX_BLE_Notify_Buf_LEN (local buf, no overflow)
  *   MTU=23 -> 14, MTU=96 -> 87, MTU>=103 -> 94
  * =============================================================
+ */
 static uint16_t ble_notify_chunk_max(void)
 {
     uint16_t _mtu = peripheral_get_mtu();