fix(pipelines): 任务脚本不得为空

src/pipeline-tasks/models/work-unit.model.ts

@@ -1,4 +1,5 @@
 import { Field, InputType, ObjectType } from '@nestjs/graphql';
+import { IsNotEmpty } from 'class-validator';
 import {
   PipelineUnits,
   PipelineUnits as PipelineUnitTypes,
@@ -9,5 +10,7 @@ import {
 export class WorkUnit {
   @Field(() => PipelineUnits)
   type: PipelineUnitTypes;
+
+  @IsNotEmpty({ each: true })
   scripts: string[];
 }