docs: update background jobs plugin docs

AdminForth/1977/background-job-append-succeeds

Author: yaroslav8765

adminforth/documentation/docs/tutorial/09-Plugins/23-background-jobs.md

@@ -387,7 +387,7 @@ type JobTask = {
     task_number: number;
     task_counter: number;
   };
-  status: 'SCHEDULED' | 'IN_PROGRESS' | 'DONE' | 'FAILED';
+  status: 'SCHEDULED' | 'IN_PROGRESS' | 'DONE' | 'FAILED' | 'DELETED';
 };
 
 const tasks = ref<JobTask[]>([]);
@@ -406,6 +406,7 @@ const taskStatusLabels: Record<JobTask['status'], string> = {
   IN_PROGRESS: 'running',
   DONE: 'done',
   FAILED: 'failed',
+  DELETED: 'deleted',
 };
 
 const props = defineProps<{
@@ -699,7 +700,7 @@ getJobStateField(jobId: string, key: string)
 getJobState(jobId: string)
 //add task to the running job
 addNewTasksToExistingJob(jobId: string, tasks: taskType[])
-//delete task from the running job (if not started yet)
+//delete task from the running job (if not started yet). The task is not removed, it gets the DELETED status and keeps its index
 deleteTasksFromExistingJob(jobId: string, taskIndex: number)
 /**
  * 

dev-demo/custom/JobCustomComponent.vue

@@ -33,7 +33,7 @@ type JobTask = {
     task_number: number;
     task_counter: number;
   };
-  status: 'SCHEDULED' | 'IN_PROGRESS' | 'DONE' | 'FAILED';
+  status: 'SCHEDULED' | 'IN_PROGRESS' | 'DONE' | 'FAILED' | 'DELETED';
 };
 
 const tasks = ref<JobTask[]>([]);
@@ -52,6 +52,7 @@ const taskStatusLabels: Record<JobTask['status'], string> = {
   IN_PROGRESS: 'running',
   DONE: 'done',
   FAILED: 'failed',
+  DELETED: 'deleted',
 };
 
 const props = defineProps<{