fix(pipelines): 更新时重复判断时误判问题。

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

@@ -1,9 +1,10 @@
-import { InputType, ObjectType } from '@nestjs/graphql';
+import { Field, InputType, Int, ObjectType } from '@nestjs/graphql';
 import { WorkUnit } from './work-unit.model';
 
 @InputType('WorkUnitMetadataInput')
 @ObjectType()
 export class WorkUnitMetadata {
+  @Field(() => Int)
   version = 1;
   units: WorkUnit[];
 }