refactor(work-service,print-worker): 优化代码结构与错误处理

1. 提取评分prompt构建逻辑减少重复代码
2. 移除冗余的参考答案图片循环逻辑
3. 重构打印服务的错误回调逻辑，统一失败处理流程
4. 新增打印服务的任务取消处理逻辑

QYZH.InteractiveMagazine.WorkService/Consumers/JournalTaskReceiveConsumer.cs

@@ -233,13 +233,14 @@ public class JournalTaskReceiveConsumer(
         {
             throw new InvalidOperationException("AI聊天服务配置不完整，请检查 AiChat 配置节点");
         }
-
+        var answerMapPrompt = BuildScorePrompt(scoreUnit, referenceAnswerMap);
+        logger.LogInformation(answerMapPrompt);
         var content = new List<object>
         {
             new
             {
                 type = "text",
-                text = BuildScorePrompt(scoreUnit, referenceAnswerMap)
+                text = answerMapPrompt
             }
         };
 
@@ -251,7 +252,7 @@ public class JournalTaskReceiveConsumer(
             content.Add(new
             {
                 type = "text",
-                text = $"以下为任务 {context.Task.Id} 的学生作答图片，共 {answerImages.Count} 张。"
+                text = $"以下是学生作答图片，共 {answerImages.Count} 张。"
             });
 
             foreach (var answerImage in answerImages)
@@ -269,31 +270,6 @@ public class JournalTaskReceiveConsumer(
             throw new InvalidOperationException($"评分单元 {scoreUnit.GroupId} 缺少答案图片");
         }
 
-        foreach (var context in scoreUnit.Questions)
-        {
-            referenceAnswerMap.TryGetValue(context.Task.Id, out var referenceAnswers);
-            var referenceAnswerImages = await BuildReferenceAnswerImageContentsAsync(context.Task.Id, referenceAnswers ?? [], cancellationToken);
-            if (referenceAnswerImages.Count == 0)
-            {
-                continue;
-            }
-
-            content.Add(new
-            {
-                type = "text",
-                text = $"以下为任务 {context.Task.Id} 的参考答案图片，共 {referenceAnswerImages.Count} 张。参考答案不是必有，评分时以题目Prompt和学生答案为主。"
-            });
-
-            foreach (var referenceAnswerImage in referenceAnswerImages)
-            {
-                content.Add(new
-                {
-                    type = "image_url",
-                    image_url = new { url = referenceAnswerImage.DataUrl }
-                });
-            }
-        }
-
         var requestBody = new
         {
             model,
@@ -403,6 +379,7 @@ public class JournalTaskReceiveConsumer(
         prompt.AppendLine("  \"Completion\": 100,");
         prompt.AppendLine("  \"Result\": \"50字内的中文评语\"");
         prompt.AppendLine("}");
+
         return prompt.ToString();
     }