OptionalenabledOptionaleventEvents to listen for (default: all)
OptionalfilterFilter changes by field values (e.g., { status: 'active' })
OptionalonOptionalonOptionalonCalled on every change
OptionalonOptionalschemaDB schema (default 'public'). Use 'system' for built-in tables like channel_messages so the engine applies the correct authorization.
Disable the subscription (default: true)