fix(sms): stop sending platform to the relay gateway

With platform "kave" (Kavenegar) the gateway answered "cURL library is not
loaded" and nothing was delivered. The body is now { phone, host, text } and
the gateway picks the line itself. SMS_RELAY_PLATFORM is removed from the
driver, docker-compose and the env examples.

Tests: sms.service.spec updated. 150 tests pass.

پیامک بدون انتخاب خط کاوه‌نگار فرستاده می‌شود و سرویس پیامک خودش خط را انتخاب می‌کند.

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

apps/api/src/modules/sms/sms.service.spec.ts

@@ -75,12 +75,11 @@ describe('SMS configuration', () => {
   });
 
   describe('relay', () => {
-    it('works out of the box, sending through Kavenegar', () => {
+    it('works out of the box', () => {
       process.env.SMS_RELAY_HOST = '10.0.0.5';
       const c = relayConfig();
       expect(c.url).toBe('http://185.231.112.101/api/createsms');
       expect(c.secret).toBeTruthy();
-      expect(c.platform).toBe('kave');
       expect(smsConfigured()).toBe(true);
     });
 
@@ -97,11 +96,6 @@ describe('SMS configuration', () => {
       expect(relayConfig().host).toBe('gold.example');
     });
 
-    it('sends platform null when SMS_RELAY_PLATFORM=default', () => {
-      process.env.SMS_RELAY_PLATFORM = 'default';
-      expect(relayConfig().platform).toBeNull();
-    });
-
     it('is not configured, and warns by name, when no host can be found', () => {
       noExternalIp();
       expect(smsConfigured()).toBe(false);
@@ -232,7 +226,6 @@ describe('SmsService.send', () => {
       phone: '09120000000',
       host: '10.0.0.5',
       text: 'سلام',
-      platform: 'kave',
     });
     expect(create).toHaveBeenCalledWith({
       data: expect.objectContaining({ recipients: '09120000000', body: 'سلام' }),