refactor：将DataLoaderService中的LoadAll*Async方法移到对应的管理服务中

- 将LoadAllDevicesAsync方法移到DeviceManagementService
 - 将LoadAllVariableTablesAsync方法移到VariableTableManagementService
 - 将LoadAllVariablesAsync方法移到VariableManagementService
 - 将LoadAllMenusAsync方法移到MenuManagementService
 - 将LoadAllMqttServersAsync方法移到MqttManagementService
 - 将LoadAllNlogsAsync方法移到LogManagementService
 - 更新DataLoaderService以使用管理服务提供的方法
 - 修改IDataLoaderService接口以移除这些方法
 - 保持与LoadAllTriggersAsync相同的模式
 - 遵循单一职责原则，提高代码一致性" (提交修改并添加描述性的提交信息)

DMS.Application/Services/Management/DeviceManagementService.cs

@@ -128,7 +128,20 @@ public class DeviceManagementService : IDeviceManagementService
         }
     }
 
-    
-
+    /// <summary>
+    /// 异步加载所有设备数据到内存中。
+    /// </summary>
+    public async Task LoadAllDevicesAsync()
+    {
+        _appStorageService.Devices.Clear();
+        var devices = await _deviceAppService.GetAllDevicesAsync();
+        
+        // 建立设备与变量表的关联
+        foreach (var device in devices)
+        {
+            // 将设备添加到安全字典
+            _appStorageService.Devices.TryAdd(device.Id, device);
+        }
+    }
 
 }