Add shared HMAC+domain auth for remote SMS wallet API.

Products can authenticate with one shared secret and tenant domain instead of per-version tokens; Bearer token remains as fallback.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/sms/sms.module.ts

@@ -1,14 +1,14 @@
 import { Module } from '@nestjs/common';
 import { NotificationsModule } from '../notifications/notifications.module';
+import { RemoteSmsAuthGuard } from '../auth/remote-sms-auth.guard';
 import { RemoteSmsController } from './remote-sms.controller';
 import { SmsController } from './sms.controller';
 import { SmsService } from './sms.service';
-import { RemoteTokenGuard } from '../auth/remote-token.guard';
 
 @Module({
   imports: [NotificationsModule],
   controllers: [SmsController, RemoteSmsController],
-  providers: [SmsService, RemoteTokenGuard],
+  providers: [SmsService, RemoteSmsAuthGuard],
   exports: [SmsService],
 })
 export class SmsModule {}