feat: V1.03 initialize 上线消息 — 固件+工具同步

vd960DBN:
- dev_initialize_pub() 改为 V1.03 格式 (msg_id/cmd/ts/data/extra_info)
- iot_mqtt_srv: 订阅改双主题 dld960/{sn}/srv, 响应 topic 改 dev
- SUBACK 后自动发 initialize 告知服务器上线
- net_srv.h: 加 dev_initialize_pub 声明

DBNMQTTool:
- protocol.py: 加 CMD_INITIALIZE
- device_manager: DeviceInfo 加 extra_info, 加 mark_online()
- main.py: 接收 initialize 消息, 自动标记设备上线
- docs: 协议 V1.03 + devlog V3.1

DBNMQTTool/main.py

@@ -30,7 +30,7 @@ from dbn_mqtt_tool.protocol import (
     CMD_IOT_TOPIC_QUERY, CMD_LOOP_PARAM_QUERY, CMD_REPORT_CONFIG,
     CMD_SSC_NET_SET, CMD_IOT_NET_SET, CMD_IOT_TOPIC_SET,
     CMD_PWD_VERIFY, CMD_PWD_SET, CMD_FACTORY_RESET, CMD_DEVICE_RESET,
-    CMD_LOOP_DATA, CMD_EVENT_REPORT, CMD_HEARTBEAT,
+    CMD_LOOP_DATA, CMD_EVENT_REPORT, CMD_HEARTBEAT, CMD_INITIALIZE,
     ERROR_MSGS, FREQ_LEVELS, OUTPUT_MODES, EVENT_TYPES,
     data_ssc_net_set, data_iot_net_set, data_iot_topic_set,
     data_pwd_verify, data_pwd_set, data_report_config,
@@ -857,6 +857,15 @@ class MainWindow(QMainWindow):
             self._devmgr.update_heartbeat(dev_serial, data)
             self._log_recv(topic, payload, f"heartbeat uptime={data.get('uptime', 0)}s")
 
+        elif cmd == CMD_INITIALIZE:
+            # V1.03: 设备上线初始化
+            data = payload.get("data", {})
+            dev_sn = data.get("dev_serial", dev_serial)
+            extra = data.get("extra_info", {})
+            self._devmgr.mark_online(dev_sn, extra)
+            self._log_recv(topic, payload, f"initialize sn={dev_sn} ver={extra.get('version','?')}")
+            self._show_json({"online": dev_sn, "info": extra})
+
         # 旧协议 / 无 cmd 字段 的消息（如 Initialize）
         elif "Method" in payload:
             self._log_recv(topic, payload, f"Method={payload.get('Method', '?')}")