feat: migrate SMS/voice to Telnyx (TeXML), keep browser dial pad on Twilio

Twilio now handles only the in-browser dial pad (Access Token + browser-Device
outbound TwiML); Telnyx takes over SMS, inbound voicemail, the AI voice
conversation loop, and staff-triggered outbound calls via TeXML. Adds
TelnyxSettings model, Communication.provider discriminator, new comms/routes
modules, and a real Telnyx Settings page.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

packages/db/generated/prisma/index-browser.js

@@ -413,6 +413,7 @@ exports.Prisma.CommunicationScalarFieldEnum = {
   channel: 'channel',
   direction: 'direction',
   status: 'status',
+  provider: 'provider',
   body: 'body',
   callDuration: 'callDuration',
   twilioSid: 'twilioSid',
@@ -441,6 +442,18 @@ exports.Prisma.TwilioSettingsScalarFieldEnum = {
   templates: 'templates'
 };
 
+exports.Prisma.TelnyxSettingsScalarFieldEnum = {
+  id: 'id',
+  userId: 'userId',
+  apiKey: 'apiKey',
+  accountSid: 'accountSid',
+  phoneNumber: 'phoneNumber',
+  texmlApplicationId: 'texmlApplicationId',
+  messagingProfileId: 'messagingProfileId',
+  webhookPublicKey: 'webhookPublicKey',
+  greetingMessage: 'greetingMessage'
+};
+
 exports.Prisma.AiSettingsScalarFieldEnum = {
   id: 'id',
   userId: 'userId',
@@ -660,6 +673,11 @@ exports.CommunicationStatus = exports.$Enums.CommunicationStatus = {
   no_answer: 'no_answer'
 };
 
+exports.CommunicationProvider = exports.$Enums.CommunicationProvider = {
+  twilio: 'twilio',
+  telnyx: 'telnyx'
+};
+
 exports.Prisma.ModelName = {
   User: 'User',
   Patient: 'Patient',
@@ -687,6 +705,7 @@ exports.Prisma.ModelName = {
   Communication: 'Communication',
   PatientDocument: 'PatientDocument',
   TwilioSettings: 'TwilioSettings',
+  TelnyxSettings: 'TelnyxSettings',
   AiSettings: 'AiSettings',
   OfficeHours: 'OfficeHours',
   OfficeContact: 'OfficeContact',