Switch OTP SMS to 0098 SOAP API because link endpoint returns HTTP 500

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

src/modules/auth/auth.service.ts

@@ -98,13 +98,13 @@ export class AuthService {
           'SMS is not configured. Set SMS_USERNAME, SMS_PASSWORD (or SMS_API_KEY), and SMS_SENDER.',
         );
       }
-      const sent = await this.sms.sendOtpSms(mobile, code);
-      if (!sent) {
+      const result = await this.sms.sendOtpSmsDetailed(mobile, code);
+      if (!result.ok) {
         this.logger.warn(
-          `OTP SMS failed for ${this.maskMobile(mobile)}`,
+          `OTP SMS failed for ${this.maskMobile(mobile)} transport=${result.transport} reason=${result.reason}`,
         );
         throw new ServiceUnavailableException(
-          'Could not send SMS. Please try again later.',
+          `Could not send SMS. Please try again later. (${result.reason})`,
         );
       }
     }