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/objects/AppointmentProcedureCreateManyInput.schema.ts

@@ -1,10 +1,9 @@
 import * as z from 'zod';
-import type { Prisma } from '../../../generated/prisma';
+import { Prisma } from '../../../generated/prisma';
+import Decimal from 'decimal.js';
 import { ProcedureSourceSchema } from '../enums/ProcedureSource.schema'
 
 import { DecimalJSLikeSchema, isValidDecimalInput } from '../../helpers/decimal-helpers';
-
-import Decimal from "decimal.js";
 const makeSchema = () => z.object({
   id: z.number().int().optional(),
   appointmentId: z.number().int(),
@@ -16,7 +15,7 @@ const makeSchema = () => z.object({
   z.number(),
   z.string(),
   z.instanceof(Decimal),
-  z.instanceof(Decimal),
+  z.instanceof(Prisma.Decimal),
   DecimalJSLikeSchema,
 ]).refine((v) => isValidDecimalInput(v), {
   message: "Field 'fee' must be a Decimal",