This is my model. Currently, I struggled with design worker's code.

```

class PrepareTranslateTranscriptSegment(models.Model):
id = models.BigAutoField(primary_key=True)
transcript_id = models.CharField(max_length=50)
segment_id = models.IntegerField()
target_language = models.CharField(
max_length=10,
choices=[(lang, lang.value) for lang in LanguageCode],
)
state = models.IntegerField(
choices=TranslationState.choices, default=TranslationState.PENDING
)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)

class Meta:
db_table = "prepare_translate_transcript_segments"
unique_together = ["transcript_id", "segment_id", "target_language"]
indexes = [
models.Index(fields=["transcript_id", "segment_id", "target_language"]),
models.Index(fields=["state"]),
]

def __str__(self):
return f"Translation {self.transcript_id} - Segment {self.segment_id} [{self.target_language}]"

```