修复设备详情500错误：移除不存在的数据库列last_total_part_count引用

src/CncModels/Entity/Machine.cs

@@ -52,9 +52,6 @@ namespace CncModels.Entity
         /// <summary>最近零件数</summary>
         public decimal? LastPartCount { get; set; }
 
-        /// <summary>最近累计零件总数（Tag1历史终身值）</summary>
-        public decimal? LastTotalPartCount { get; set; }
-
         /// <summary>最近操作模式</summary>
         public string LastOperateMode { get; set; }
 

src/CncRepository/Impl/MachineRepository.cs

@@ -20,7 +20,7 @@ namespace CncRepository.Impl
         /// <summary>在线判断SQL片段：last_ping_time在20秒内视为在线</summary>
         private const string OnlineExpr = "(CASE WHEN last_ping_time IS NOT NULL AND last_ping_time >= NOW() - INTERVAL 20 SECOND THEN 1 ELSE 0 END)";
 
-        private const string SelectColumns = @"id as Id, device_code as DeviceCode, name as Name, workshop_id as WorkshopId, collect_address_id as CollectAddressId, ip_address as IpAddress, brand_id as BrandId, is_enabled as IsEnabled, {0} as IsOnline, last_ping_time as LastPingTime, last_ping_latency as LastPingLatency, last_collect_time as LastCollectTime, last_device_status as LastDeviceStatus, last_run_status as LastRunStatus, last_program_name as LastProgramName, last_part_count as LastPartCount, last_total_part_count as LastTotalPartCount, last_operate_mode as LastOperateMode, last_machining_status as LastMachiningStatus, created_at as CreatedAt, updated_at as UpdatedAt";
+        private const string SelectColumns = @"id as Id, device_code as DeviceCode, name as Name, workshop_id as WorkshopId, collect_address_id as CollectAddressId, ip_address as IpAddress, brand_id as BrandId, is_enabled as IsEnabled, {0} as IsOnline, last_ping_time as LastPingTime, last_ping_latency as LastPingLatency, last_collect_time as LastCollectTime, last_device_status as LastDeviceStatus, last_run_status as LastRunStatus, last_program_name as LastProgramName, last_part_count as LastPartCount, last_operate_mode as LastOperateMode, last_machining_status as LastMachiningStatus, created_at as CreatedAt, updated_at as UpdatedAt";
 
         public Machine GetById(int id)
         {

src/CncService/Impl/MachineService.cs

@@ -136,7 +136,7 @@ namespace CncService.Impl
                 PartCount = machine.LastPartCount,
                 RunStatus = machine.LastRunStatus ?? latest?.RunStatus,
                 OperationMode = machine.LastOperateMode,
-                TotalPartCount = machine.LastTotalPartCount,
+                TotalPartCount = null,
                 SpindleSpeedSet = null,
                 FeedSpeedSet = null,
                 SpindleSpeedActual = null,