feat: 新增工作服务项目并调整部分接口路由

1. 新增QYZH.InteractiveMagazine.WorkService工作服务项目，包含队列消费者框架、Hangfire定时任务支持
2. 修复PetService中未定义FeedPetOutput变量的问题
3. 调整JournalController的路由前缀从api/icr改为api
4. 将工作服务项目添加到解决方案中

QYZH.InteractiveMagazine.WorkService/Consumers/JournalTaskReceiveConsumer.cs

@@ -0,0 +1,35 @@
+using System.Text;
+
+namespace QYZH.InteractiveMagazine.WorkService.Consumers;
+
+/// <summary>
+/// 期刊任务接收消费者（示例）
+/// </summary>
+public class JournalTaskReceiveConsumer : IQueueConsumer
+{
+    private readonly ILogger<JournalTaskReceiveConsumer> _logger;
+
+    public JournalTaskReceiveConsumer(ILogger<JournalTaskReceiveConsumer> logger)
+    {
+        _logger = logger;
+    }
+
+    public string QueueName => "mq.Journal.task.receive";
+
+    public async Task HandleAsync(byte[] message)
+    {
+        var body = Encoding.UTF8.GetString(message);
+        _logger.LogInformation("收到期刊任务消息: {Message}", body);
+
+        // TODO: 在此编写具体的消息处理逻辑
+
+        await Task.CompletedTask;
+    }
+
+    public Task OnErrorAsync(byte[] message, Exception exception)
+    {
+        var body = Encoding.UTF8.GetString(message);
+        _logger.LogError(exception, "处理期刊任务消息失败: {Message}", body);
+        return Task.CompletedTask;
+    }
+}