DID Indy Resolver can not resolve Indy DID with additional namespace input

[hviet2603]

Hello development team,

As the title described, indy dids with namespace input e.g. did:indy:example:WRfXPg8dantKVubE3HX8pw seem not to be resolved by the Indy resolver.

I think the regex in messaging/valid.py does not match:

class IndyDID(Regexp):
    """Validate value against indy DID."""

    EXAMPLE = "did:indy:sovrin:WRfXPg8dantKVubE3HX8pw"
    PATTERN = re.compile(rf"^(did:(sov|indy):)?[{B58}]{{21,22}}$")

    def __init__(self):
        """Initialize the instance."""

        super().__init__(
            IndyDID.PATTERN,
            error="Value {input} is not an indy decentralized identifier (DID)",
        )

The pattern is also later used in building the document and submitting Indy VDR requests.