Make BatchProgressEnum inherit from str

This allows more readable code, as we can do

  if batch.batch_progress == BatchProgressEnum.VALIDATION_FAILED:

instead of

  if batch.batch_progress == str(BatchProgressEnum.VALIDATION_FAILED):

or

  if batch.batch_progress == BatchProgressEnum.VALIDATION_FAILED.value:

setra_client/models.py

@@ -27,7 +27,7 @@ class BaseModel(pydantic.BaseModel):
         return cls.from_dict(data)
 
 
-class BatchProgressEnum(Enum):
+class BatchProgressEnum(str, Enum):
     CREATED = 'created'
     VALIDATION_COMPLETED = 'validation_completed'
     VALIDATION_FAILED = 'validation_failed'