chore: update .env.example with PAPI license configuration

- Added PAPI license key and admin server URL for interactive message functionality.
- Included instructions for obtaining the license key.

Author: DavidsonGomes

.env.example

@@ -401,3 +401,15 @@ LANGUAGE=en
 # PROXY_PROTOCOL=http
 # PROXY_USERNAME=
 # PROXY_PASSWORD=
+
+
+# ═══════════════════════════════════════════════════════════════
+# PAPI LICENSE SYSTEM (for interactive messages: buttons, lists, carousel)
+# ═══════════════════════════════════════════════════════════════
+# License key provided by PAPI admin
+# Get your license key at: https://padmin.intrategica.com.br/register.html
+# Interactive messages (buttons, lists, carousel) require a valid license
+PAPI_LICENSE_KEY=2FE61805-4639DE08-EE554154-6F42B6FA
+
+# Admin server URL for license verification
+PAPI_LICENSE_ADMIN_URL=https://padmin.intrategica.com.br/