Right now when using the Twilio integration for outgoing calls, I can only pass a config_id and that's it. That's very limiting since this does not allow me to start the call with a personalized greeting. It means that I either need to create one config per call (which seems to be not the intention of configs) or send session_settings when I get the CHAT_START_MESSAGE webhook notification. The latter approach has a bit of a delay, so I still cannot use a personalized greeting with a generic config. I think it would be great if we could pass additional data through the Twilio webhook, like dynamic variables. That would help a lot.