text: from django.db import models
  import jsonfield
  import uuid
  
  STATUS_ACTIVE = "active"
  STATUS_FAILED = "failed"
  STATUS_FINISHED = "finished"
  STATUSES = [
      (STATUS_ACTIVE, STATUS_ACTIVE),
      (STATUS_FAILED, STATUS_FAILED),
      (STATUS_FINISHED, STATUS_FINISHED),
  ]
  
  
  class AnnotateBackgroundJob(models.Model):
      uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
      status = models.CharField(max_length=16, choices=STATUSES, default=STATUS_ACTIVE)
      args = jsonfield.JSONField()
      scores = jsonfield.JSONField()
      info = jsonfield.JSONField()
      message = models.CharField(max_length=512)
  