OptionalconnectionEvent Hubs namespace connection string.
OptionaleventDefault event hub (entity) name used when publish/subscribe omit one.
OptionalconsumerConsumer group used by subscribe(). Defaults to '$Default'.
OptionalclientA pre-built @azure/event-hubs module (or a mock exposing the two client
constructors). When provided, connect() uses it directly and does NOT
require the driver — this is how tests inject mocks.
Connection options for
EventHubsStore.