feat(message):为消息添加唯一标识符支持

- 在 ZtMessage DTO 中新增 messageId 字段
- 发送消息前自动生成 UUID 作为默认 messageId
- 更新 Kafka 生产者日志，包含 messageId 以便追踪
- 增强错误日志记录，附带 messageId 提升调试效率

src/main/java/com/ycwl/basic/integration/message/dto/ZtMessage.java

@@ -15,6 +15,7 @@ import java.util.Map;
 @AllArgsConstructor
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public class ZtMessage {
+    private String messageId;   // unique message identifier
     private String channelId;   // required
     private String title;       // required
     private String content;     // required

src/main/java/com/ycwl/basic/integration/message/service/ZtMessageProducerService.java

@@ -27,18 +27,24 @@ public class ZtMessageProducerService {
 
     public void send(ZtMessage msg) {
         validate(msg);
+        
+        // Generate messageId if not present
+        if (StringUtils.isBlank(msg.getMessageId())) {
+            msg.setMessageId(java.util.UUID.randomUUID().toString());
+        }
+        
         String topic = kafkaProps != null && StringUtils.isNotBlank(kafkaProps.getZtMessageTopic())
                 ? kafkaProps.getZtMessageTopic()
                 : DEFAULT_TOPIC;
         String key = msg.getChannelId();
         String payload = toJson(msg);
 
-        log.info("[ZT-MESSAGE] producing to topic={}, key={}, title={}", topic, key, msg.getTitle());
+        log.info("[ZT-MESSAGE] producing to topic={}, key={}, messageId={}, title={}", topic, key, msg.getMessageId(), msg.getTitle());
         kafkaTemplate.send(topic, key, payload).whenComplete((metadata, ex) -> {
             if (ex != null) {
-                log.error("[ZT-MESSAGE] produce failed: {}", ex.getMessage(), ex);
+                log.error("[ZT-MESSAGE] produce failed: messageId={}, error={}", msg.getMessageId(), ex.getMessage(), ex);
             } else if (metadata != null) {
-                log.info("[ZT-MESSAGE] produced: partition={}, offset={}", metadata.getRecordMetadata().partition(), metadata.getRecordMetadata().offset());
+                log.info("[ZT-MESSAGE] produced: messageId={}, partition={}, offset={}", msg.getMessageId(), metadata.getRecordMetadata().partition(), metadata.getRecordMetadata().offset());
             }
         });
     }