fix(vd960DBN): UART2 粘帧/checksum fail — 高频打印关中断丢字节 + flag 不清

现场: LUP 帧后 checksum fail 刷屏 (坏帧: 7F 03 39 EF... 多帧拼接)。
根因链条:
1. LUP Rx 打印 190B @256000 = 7.4ms 关中断 (PRINT 临界区)
   → UART2(19200) RX 溢出丢字节 → 帧解析错位 → 粘帧
2. g_pkg_uart_2.flag 清理缺失: uart_srv 0xC0 分支不 InitPkgUart,
   tcp_json_push_sensor not authed 提前 return 也不清
   → 坏帧反复处理 → checksum fail 刷屏

修复:
- LUP Rx 打印 #if 0 (高频打印关中断是丢字节根因, 调试时开)
- json_sensor_callback not authed 打印 #if 0 (每帧刷屏)
- uart_srv 所有分支消费后统一 InitPkgUart (0xC0 + 非0xC0无BLE)
- 顺带修 report disabled 双反斜杠

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c

@@ -883,8 +883,13 @@ static void json_sensor_callback(const uint8_t *pkg, uint16_t len)
 
     // Check: socket active, authed, report enabled
     if (g_json_socket_listen == 0xFF) { PRINT("JSON: sensor_cb skip: no socket\n"); return; }
+    /* 2026-08-13: not authed 每帧打印太吵 (Loop MCU 高频上报), 且占用主循环
+       关中断窗口 → UART2 丢字节。调试时打开 */
+#if 0
     if (g_json_auth_state != JSON_STATE_AUTHED) { PRINT("JSON: sensor_cb skip: not authed\n"); return; }
-    if (!g_report_cfg.enable) { PRINT("JSON: sensor_cb skip: report disabled\\n"); return; }
+#endif
+    if (g_json_auth_state != JSON_STATE_AUTHED) { return; }
+    if (!g_report_cfg.enable) { PRINT("JSON: sensor_cb skip: report disabled\n"); return; }
 
     LUP_SensorReport sr;
     memset(&sr, 0, sizeof(sr));