Validate Bird credentials against bird.ladill.com, not the monolith.

Keys issued on Bird live in Bird’s DB; the old ladill.com relay always returned Invalid or missing API key.

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

config/smtp.php

@@ -1,9 +1,9 @@
 <?php
 
 return [
-    'platform_api_url' => env('SMTP_PLATFORM_API_URL', 'https://ladill.com/api/smtp'),
+    'platform_api_url' => env('SMTP_PLATFORM_API_URL', 'https://bird.ladill.com/api/smtp'),
     'platform_api_key' => env('SMTP_API_KEY_CARE'),
-    'customer_relay_url' => env('SMTP_CUSTOMER_RELAY_URL', 'https://ladill.com/api/smtp'),
+    'customer_relay_url' => env('SMTP_CUSTOMER_RELAY_URL', 'https://bird.ladill.com/api/smtp'),
     'from' => env('CARE_SMTP_FROM', 'care@ladill.com'),
     'from_name' => env('CARE_SMTP_FROM_NAME', 'Ladill Care'),
 ];