Decode Azure Cognitive Search storage paths.py

import base64

# Python port of .NET's HttpServerUtility.UrlTokenDecode
def url_token_decode(encoded_string: str) -> bytes:
    # Get the padding count from the last character of the encoded string
    padding_count = ord(encoded_string[-1]) - ord("0")
    
    # Remove the last character (which indicates padding)
    encoded_string = encoded_string[:-1]
    
    # Replace - and _ to revert to standard base64
    encoded_string = encoded_string.replace("-", "+").replace("_", "/")
    
    # Add back the removed padding
    encoded_string += "=" * padding_count
    
    # Base64 decode
    return base64.b64decode(encoded_string).decode("utf-8")