PCL Email AI Enterprise Tracking - Send OTP Phase 1

Files:
1) EmailTrackingApiClient.php
2) sendOtp.php
3) sendOtp_original_backup.php

Upload both files to WPL server:
/var/www/html/email_api/EmailTrackingApiClient.php
/var/www/html/email_api/sendOtp.php

No DB credentials are used on WPL.
Tracking insert happens through PCL V15 API:
https://www.procorporateleague.com/pcl_rest/api/v15/email/tracking/log

Required PCL route:
$app->post('/email/tracking/log', 'App\Http\Controllers\V15\EmailEnterpriseModuleController@trackLegacyEmail');

Test request:
POST https://wplspeedqueen.com/email_api/sendOtp.php
{
  "name": "Test User",
  "email": "test@example.com",
  "mobile": "9999999999",
  "lead_id": "28532",
  "otp": "123456",
  "debug_tracking": 1
}