Changes to Stream session workspace file changes

removed the agent_switch_saga enum value from the reporting_owner response property for the response status 404

removed the agent_switch_saga enum value from the reporting_owner response property for the response status 500

removed the agent_switch_saga enum value from the reporting_owner response property for the response status 501

added the optional property reporting_owner to the response with the 404 status

added the optional property reporting_owner to the response with the 500 status

added the optional property reporting_owner to the response with the 501 status

endpoint added