fix(llm): 修复模型更新时的空指针异常

- 在 FineTuningTaskSyncService 类中的定时任务方法中增加了对 hostUrl 的空值检查
- 如果 hostUrl 为空，则跳过当前迭代，避免出现空指针异常

yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/finetuningtask/FineTuningTaskSyncService.java

@@ -16,6 +16,7 @@ import com.alibaba.fastjson.JSONObject;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
 
@@ -179,6 +180,9 @@ public class FineTuningTaskSyncService {
                 String hostUrl = getHostUrl(fineTuningTaskDO);
                 FineTuningTaskDO updateObj = new FineTuningTaskDO();
                 updateObj.setId(fineTuningTaskDO.getId());
+                if (StringUtils.isBlank(hostUrl)){
+                    continue;
+                }
                 getCheckPoint(fineTuningTaskDO, jobModelName, hostUrl, updateObj);
                 fineTuningTaskMapper.updateById(updateObj);
             }