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/shared/schemas/enums/CommunicationProvider.schema.ts

@@ -0,0 +1,5 @@
+import * as z from 'zod';
+
+export const CommunicationProviderSchema = z.enum(['twilio', 'telnyx'])
+
+export type CommunicationProvider = z.infer<typeof CommunicationProviderSchema>;

packages/db/shared/schemas/enums/CommunicationScalarFieldEnum.schema.ts

@@ -1,5 +1,5 @@
 import * as z from 'zod';
 
-export const CommunicationScalarFieldEnumSchema = z.enum(['id', 'patientId', 'userId', 'channel', 'direction', 'status', 'body', 'callDuration', 'twilioSid', 'createdAt'])
+export const CommunicationScalarFieldEnumSchema = z.enum(['id', 'patientId', 'userId', 'channel', 'direction', 'status', 'provider', 'body', 'callDuration', 'twilioSid', 'createdAt'])
 
 export type CommunicationScalarFieldEnum = z.infer<typeof CommunicationScalarFieldEnumSchema>;

packages/db/shared/schemas/enums/TelnyxSettingsScalarFieldEnum.schema.ts

@@ -0,0 +1,5 @@
+import * as z from 'zod';
+
+export const TelnyxSettingsScalarFieldEnumSchema = z.enum(['id', 'userId', 'apiKey', 'accountSid', 'phoneNumber', 'texmlApplicationId', 'messagingProfileId', 'webhookPublicKey', 'greetingMessage'])
+
+export type TelnyxSettingsScalarFieldEnum = z.infer<typeof TelnyxSettingsScalarFieldEnumSchema>;