feat(DBNMQTTool): 脱机事件日志命令支持 — log_stat/log_query/log_clear (MQTT V1.06)

- protocol.py: CMD_LOG_* 常量 + LOG_COMMANDS + data_log_query 边界钳制
  (start_seq>=1, count 1~4) + LOG_EVENT_TYPE_DESC 事件类型中文描述
- main.py: 参数配置 Tab 新增脱机日志面板 (统计/拉取/清除 + 显示区)
- _on_message 响应分发: log_stat 统计展示, log_query 记录格式化
  (unix_ts 真实时间 / boot+ts_ms 未同步), log_clear 二次确认
- devlog 追加

DBNMQTTool/dbn_mqtt_tool/protocol.py

@@ -61,6 +61,11 @@ CMD_LOOP_PARAM_SET   = "loop_param_set"
 CMD_LOOP_PARAM_QUERY = "loop_param_query"
 CMD_REPORT_CONFIG    = "report_config"
 
+# V1.06: 脱机事件日志
+CMD_LOG_STAT   = "log_stat"
+CMD_LOG_QUERY  = "log_query"
+CMD_LOG_CLEAR  = "log_clear"
+
 # 设备上报
 CMD_LOOP_DATA    = "loop_data"
 CMD_EVENT_REPORT = "event_report"
@@ -71,6 +76,7 @@ CMD_INITIALIZE   = "initialize"      # V1.03: 设备上电初始化
 CONFIG_SET_COMMANDS = {CMD_DEV_SERIAL_SET, CMD_SSC_NET_SET, CMD_IOT_NET_SET, CMD_IOT_TOPIC_SET, CMD_LOOP_PARAM_SET}
 CONFIG_QUERY_COMMANDS = {CMD_DEV_INFO_QUERY, CMD_SSC_NET_QUERY, CMD_IOT_NET_QUERY, CMD_IOT_TOPIC_QUERY, CMD_LOOP_PARAM_QUERY}
 CTRL_COMMANDS = {CMD_PWD_VERIFY, CMD_PWD_SET, CMD_FACTORY_RESET, CMD_DEVICE_RESET, CMD_REPORT_CONFIG}
+LOG_COMMANDS = {CMD_LOG_STAT, CMD_LOG_QUERY, CMD_LOG_CLEAR}   # V1.06 脱机日志
 
 
 # ============================================================
@@ -104,6 +110,21 @@ FREQ_LEVELS = ["high", "mid_high", "mid_low", "low"]
 OUTPUT_MODES = ["exist", "enter_pulse", "leave_pulse", "direction"]
 EVENT_TYPES = ["car_enter", "car_leave", "loop_cut", "loop_restore"]
 
+# 脱机事件日志类型描述 (log_query 响应 records[].type, MQTT V1.06)
+LOG_EVENT_TYPE_DESC = {
+    "boot": "上电/复位",
+    "iot_connect": "MQTT TCP 连接成功",
+    "iot_ready": "MQTT 订阅完成→发 initialize",
+    "iot_disconnect": "MQTT 断连",
+    "iot_reconn": "重连退避",
+    "evt_retry": "event ACK 超时重发",
+    "evt_giveup": "event 重试耗尽挂起",
+    "coil": "线圈事件",
+    "time_anchor": "时钟同步锚点",
+    "log_clear": "日志清除(审计)",
+    "unknown": "未知类型",
+}
+
 
 # ============================================================
 # 消息构建
@@ -214,6 +235,14 @@ def data_report_config(sensor_type: int = 12, enable: bool = True,
     }
 
 
+def data_log_query(start_seq: int = 1, count: int = 4) -> dict:
+    """V1.06 log_query 分页拉取脱机事件日志 (count 上限 4, 设备侧超限按 4 处理)"""
+    return {
+        "start_seq": max(1, int(start_seq)),
+        "count": min(4, max(1, int(count))),
+    }
+
+
 # ============================================================
 # 解析设备上报
 # ============================================================