feat(repos): 获取 commit logs 时，允许返回错误信息给调用方。

src/repos/dtos/log-list.model.ts

@@ -1,10 +1,12 @@
 import { ObjectType, Field } from '@nestjs/graphql';
+import { Type } from 'class-transformer';
 import { LogResult, DefaultLogFields } from 'simple-git';
 import { PipelineTask } from '../../pipeline-tasks/pipeline-task.entity';
 
 @ObjectType()
 export class Commit {
   hash: string;
+  @Type(() => Date)
   date: Date;
   message: string;
   refs: string;