Image uploaded without a ContentType raises a 500

[joelvdavies]

Found while attempting to upload the generate_mock_data.py script using the requests python module in #45. See https://stackoverflow.com/questions/76647047/content-type-is-different-when-sending-file-to-fastapi-backend-using-curl-than-p. FastAPI is guessing the appropriate content type whereas requests does not. The frontend will likely guess it too, but the error should be handled more gracefully to give an appropriate error message instead. Example reproduction code:

    with open("test/files/image.jpg", mode="rb") as file:
        image = requests.post(
            f"{API_URL}/images",
            data={
                "entity_id": "65df5ee771892ddcc08bd28f",
            },
            files={"upload_file": file},
            timeout=5,
        ).json()

[joelvdavies]

Possibly fixed by #34