fix: [#253] update MySQL 8.4 authentication parameter

MySQL 8.4 deprecated --default-authentication-plugin in favor of
--mysql-native-password=ON. This change updates the docker-compose
template to use the correct MySQL 8.4 syntax.

The old parameter caused MySQL container initialization to fail with:
'unknown variable default-authentication-plugin=mysql_native_password'

Verified working with MySQL 8.4.7 in manual E2E test.

Author: josecelano

templates/docker-compose/docker-compose.yml.tera

@@ -148,7 +148,7 @@ services:
       - "3306:3306"
     volumes:
       - mysql_data:/var/lib/mysql
-    command: --default-authentication-plugin=mysql_native_password
+    command: --mysql-native-password=ON
     healthcheck:
       test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "-p$$MYSQL_ROOT_PASSWORD"]
       interval: 10s