fix: Graphql 类型报错

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

@@ -1,6 +1,13 @@
-import { PipelineUnits as PipelineUnitTypes } from '../enums/pipeline-units.enum';
+import { Field, InputType, ObjectType } from '@nestjs/graphql';
+import {
+  PipelineUnits,
+  PipelineUnits as PipelineUnitTypes,
+} from '../enums/pipeline-units.enum';
 
+@ObjectType()
+@InputType('WorkUnitInput')
 export class WorkUnit {
+  @Field(() => PipelineUnits)
   type: PipelineUnitTypes;
   scripts: string[];
 }