{"message":"Patient Messaging Backend API","version":"1.0.0","endpoints":{"health":"/health","sendSMS":"POST /api/messages/send-sms","sendVoice":"POST /api/messages/send-voice","getMessages":"GET /api/messages","twilioWebhookSMS":"POST /api/webhooks/twilio/sms","twilioWebhookVoice":"POST /api/webhooks/twilio/voice","twilioWebhookStatus":"POST /api/webhooks/twilio/status","telnyxWebhook":"POST /api/webhooks/telnyx"}}