OptionalclientInjected transport (bypasses lazy SDK load).
OptionalcredentialsAWS credentials (for lazy SDK load).
OptionaldeadJob name → dead-letter queue URL mapping (optional).
OptionalendpointCustom endpoint URL (for ElasticMQ / local testing).
Job name → queue URL mapping.
OptionalregionAWS region (for lazy SDK load).
OptionalvisibilityVisibility timeout in seconds for claims (default 30).
Options for SQS queue adapter.