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# Type of request: This is a ...

[ ] bug report
[X ] feature request

# Detailed description

I'm using localstack to create a dynamoDb table locally with a dynamodb stream and a flink application consuming data from the stream
The shardId created in localstack follows this format

shardId-000000000000-798cedd84a2953c5af70a131f8701f35

Flink expects this format
shardId-00000001592367572726-07776efd

The difference is just after the prefix shardId.
Normally the real shardId created by amazon use is composed by shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

The current shardId format is not valid for flink applications and it's not following the real pattern used by amazon

## Expected behavior

ShardId must follow the pattern
shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

## Actual behavior

The shardId follows the pattern
shardId prefix, 12 0s and 33 characters separated by '-'

# Steps to reproduce

Create a dynamodb table

## Command used to start LocalStack

I'm using docker and docker compose to run localstack


## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)

aws --endpoint-url=http://localhost:4566 dynamodb create-table \
    --table-name temp4 \
    --attribute-definitions AttributeName=partition_key,AttributeType=S AttributeName=sort_key,AttributeType=S \
    --key-schema AttributeName=partition_key,KeyType=HASH AttributeName=sort_key,KeyType=RANGE \
    --provisioned-throughput ReadCapacityUnits=100,WriteCapacityUnits=100 \
    --stream-specification StreamEnabled=true,StreamViewType=NEW_AND_OLD_IMAGES


if not port:
            if api in ['', None, '_unknown_']:
                truncated = truncate(data)
                LOG.info(('Unable to find forwarding rule for host "%s", path "%s", '
                    'target header "%s", auth header "%s", data "%s"') % (host, path, target, auth_header, truncated))
            else:
                LOG.info(('Unable to determine forwarding port for API "%s" - please '
                    'make sure this API is enabled via the SERVICES configuration') % api)
            response = Response()
            response.status_code = 404
            response._content = '{"status": "running"}'
            return response
        use_ssl = config.USE_SSL
        connect_host = '%s:%s' % (config.HOSTNAME, port)
        url = 'http%s://%s%s' % ('s' if use_ssl else '', connect_host, path)
        headers['Host'] = host
        function = getattr(requests, method.lower())
        if isinstance(data, dict):
            data = json.dumps(data)
        response = function(url, data=data, headers=headers, verify=False)
        return response
def get_api_from_headers(headers, path=None):
    """ Determine API and backend port based on Authorization headers. """
    target = headers.get('x-amz-target', '')
    host = headers.get('host', '')
    auth_header = headers.get('authorization', '')
    ls_target = headers.get(HEADER_LOCALSTACK_TARGET, '')
    path = path or '/'
    
    result = '_unknown_', 0