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/prisma/migrations/20260903183731_add_telnyx_settings_and_communication_provider/migration.sql

@@ -0,0 +1,25 @@
+-- CreateEnum
+CREATE TYPE "CommunicationProvider" AS ENUM ('twilio', 'telnyx');
+
+-- AlterTable
+ALTER TABLE "communications" ADD COLUMN "provider" "CommunicationProvider" NOT NULL DEFAULT 'twilio';
+
+-- CreateTable
+CREATE TABLE "telnyx_settings" (
+    "id" SERIAL NOT NULL,
+    "userId" INTEGER NOT NULL,
+    "apiKey" TEXT NOT NULL,
+    "phoneNumber" TEXT NOT NULL,
+    "texmlApplicationId" TEXT,
+    "messagingProfileId" TEXT,
+    "webhookPublicKey" TEXT,
+    "greetingMessage" TEXT,
+
+    CONSTRAINT "telnyx_settings_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "telnyx_settings_userId_key" ON "telnyx_settings"("userId");
+
+-- AddForeignKey
+ALTER TABLE "telnyx_settings" ADD CONSTRAINT "telnyx_settings_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

packages/db/prisma/migrations/20260903185238_add_telnyx_account_sid/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "telnyx_settings" ADD COLUMN "accountSid" TEXT;

packages/db/prisma/schema.prisma

@@ -44,6 +44,7 @@ model User {
   cloudFiles           CloudFile[]
   communications       Communication[]
   twilioSettings        TwilioSettings?
+  telnyxSettings        TelnyxSettings?
   aiSettings            AiSettings?
   officeHours           OfficeHours?
   officeContact         OfficeContact?
@@ -563,6 +564,11 @@ enum CommunicationStatus {
   no_answer
 }
 
+enum CommunicationProvider {
+  twilio
+  telnyx
+}
+
 model Communication {
   id        Int  @id @default(autoincrement())
   patientId Int
@@ -571,9 +577,13 @@ model Communication {
   channel   CommunicationChannel
   direction CommunicationDirection
   status    CommunicationStatus
+  // Which platform produced twilioSid — twilio for dial-pad-originated calls,
+  // telnyx for everything else (SMS, inbound/AI voice, staff-triggered outbound calls).
+  provider  CommunicationProvider @default(twilio)
 
   body         String?
   callDuration Int?
+  // Provider SID — Twilio MessageSid/CallSid, or Telnyx message/call id. See `provider`.
   twilioSid    String?
 
   createdAt DateTime @default(now())
@@ -607,6 +617,8 @@ model TwilioSettings {
   accountSid      String
   authToken       String
   phoneNumber     String
+  // Vestigial — inbound voice moved to Telnyx (TelnyxSettings.greetingMessage). No longer
+  // read/written; kept to avoid a destructive migration for a cosmetic cleanup.
   greetingMessage String?
   templates       Json?
 
@@ -615,6 +627,24 @@ model TwilioSettings {
   @@map("twilio_settings")
 }
 
+model TelnyxSettings {
+  id                 Int     @id @default(autoincrement())
+  userId             Int     @unique
+  apiKey             String
+  // Telnyx account SID (Mission Control Portal), required to place outbound
+  // TeXML calls via POST /texml/Accounts/{accountSid}/Calls — separate from apiKey.
+  accountSid         String?
+  phoneNumber        String
+  texmlApplicationId String?
+  messagingProfileId String?
+  webhookPublicKey   String?
+  greetingMessage    String?
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@map("telnyx_settings")
+}
+
 model AiSettings {
   id                Int     @id @default(autoincrement())
   userId            Int     @unique