feat(llm): 仅获取未微调的基础模型

- 在获取基础模型列表时，添加了只获取未微调（is_finetuned=0）的模型的条件

yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/basemodel/BaseModelServiceImpl.java

@@ -157,6 +157,7 @@ public class BaseModelServiceImpl implements BaseModelService {
     public List<BaseModelDO> getBaseModelList () {
         LambdaQueryWrapper<BaseModelDO> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(BaseModelDO::getIsActive, 1);
+        queryWrapper.eq(BaseModelDO::getIsFinetuned, 0);
         List<BaseModelDO> baseModelDOS = baseModelMapper.selectList(queryWrapper);
         return baseModelDOS;
     }