Record class does not read "tags" dictionary from OSDU records

When fetching records from OSDU through the osdu_api.clients.storage.record_client.RecordClient class and reading them into osdu_api.models.storage.record.Record objects, the tags dictionary is lost. If the record is then manipulated and written back to OSDU using RecordClient.create_update_records(), all existing tags are lost. This impacts any library or service using this SDK to retrieve and manipulate records in the OSDU Storage API.