Rotation and mirroring are always set to 0 and False in ListProcessElements

# Create an element with a rotation or mirroring
>>> element = cli.request('CreateElement', body={
    "corpus": CORPUS_ID,
    "name": "Test element",
    "type": "folder",
    "rotation_angle": 42,
    "mirrored": True,
})

# Create a process that includes this element
>>> process = cli.request('CreateElementsWorkflow', body={
    "corpus": CORPUS_ID,
    "element": element['id'],
})

# List the process' elements
>>> next(cli.paginate('ListProcessElements', id=process['id'], with_image=True))
{'id': '6ca73acf-f518-4af5-b2ce-7eea9748d1fc',
 'type': 'folder',
 'name': 'Test element',
 'image_id': None,
 'image_width': None,
 'image_height': None,
 'image_url': None,
 'polygon': None,
 'rotation_angle': 0,
 'mirrored': False}