Full lab documentation and infrastructure as code

- Trino catalogs, Grafana, Spark jobs, LDAP LDIF, NPM compose
- Airflow DAG scripts, Proxmox VM inventory, network docs
- Ansible playbook, Gitea CI validate workflow
- Backup and health-check scripts, cron documentation
- Homepage DOCS tab with links to all documentation
- Extended collect-fleet-config.sh and populate-repo.py

config/trino/catalog/mysql_hr.properties

@@ -0,0 +1,4 @@
+connector.name=mysql
+connection-url=jdbc:mysql://10.0.21.51:3306
+connection-user=mo
+connection-password=REDACTED