MQTT全局服务订阅，基本功能创建，标签打印等功能基本实现

ZR.Admin.WebApi/Controllers/mqtt/MqttController.cs

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+using Microsoft.AspNetCore.Mvc;
+using MQTTnet.Protocol;
+using ZR.Common.MqttHelper;
+using ZR.Model.MES.wms;
+using ZR.Model.MES.wms.Dto;
+using ZR.Service.mes.wms.IService;
+
+namespace ZR.Admin.WebApi.Controllers
+{
+    /// <summary>
+    /// agv 相关接口
+    /// </summary>
+
+    [Route("/mqtt")]
+    public class MqttController : BaseController
+    {
+        private readonly MqttService _mqttService;
+
+        public MqttController(MqttService mqttService)
+        {
+            _mqttService = mqttService;
+        }
+
+        /// <summary>
+        /// 1. 发布信息
+        /// </summary>
+        /// <param name="topic">主题</param>
+        /// <param name="payload">信息</param>
+        /// <returns></returns>
+
+        [HttpPost("publish")]
+        public async Task<IActionResult> PublishMessage(string topic, string payload)
+        {
+            try
+            {
+                // 发布消息到MQTT代理服务器
+                await _mqttService.PublishAsync(
+                    topic,
+                    payload,
+                    MqttQualityOfServiceLevel.AtLeastOnce,
+                    false
+                );
+
+                return Ok("消息已发布");
+            }
+            catch (Exception ex)
+            {
+                return StatusCode(500, $"发布消息失败: {ex.Message}");
+            }
+        }
+    }
+}