Changes to Next Task

added the optional property artifact_spec to the response with the 200 status

added the non-success response with the status 403

added the optional property cli to the response with the 200 status

added the optional property closed_at to the response with the 200 status

added the optional property completed_at to the response with the 200 status

added the optional property max_output_tokens to the response with the 200 status

added the optional property max_retries to the response with the 200 status

added the optional property max_turns to the response with the 200 status

added the optional property meta_messages to the response with the 200 status

added the optional property retry_count to the response with the 200 status

added the optional property retry_delay_s to the response with the 200 status

added the optional property terminal_reason to the response with the 200 status