add image decod exception handling

def decode_base64_to_image(encoding):

    if encoding.startswith("data:image/"):

        encoding = encoding.split(";")[1].split(",")[1]

    return Image.open(BytesIO(base64.b64decode(encoding)))

    try:

        image = Image.open(BytesIO(base64.b64decode(encoding)))

        return image

    except Exception as err:

        raise HTTPException(status_code=500, detail="Invalid encoded image")

def encode_pil_to_base64(image):

    with io.BytesIO() as output_bytes: