feat: token count implement

.env.example

@@ -36,6 +36,9 @@ MYSQL_DATABASE_URL=mysql://db_user:db_password@localhost:3306/external_database_
 EXTERNAL_TABLE_GRADES=notas
 EXTERNAL_ID_TIPO_NOTA=1
 
+# Bark TTS API (Text-to-Speech for questions)
+BARK_API_URL=http://t-800:8443
+
 # Branding Defaults
 DEFAULT_ORG_NAME="Norteamericano"
 DEFAULT_PLATFORM_NAME="Norteamericano Learning"