✨ Commits existing images to git

- Implemented sync-roles.sh to synchronize Active Directory group memberships as MariaDB roles and user accounts.
- Created Containerfile for building a custom ldap2pg image with patched YAML decoding.
- Added provision-user-db.sh for provisioning user databases and roles based on LDAP synchronization.
- Introduced a new Containerfile for MariaDB with PAM authentication via pam_ldap.
- Configured PAM service for MariaDB logins and added necessary plugins for LDAP authentication.
- Implemented health checks and entrypoint scripts for MariaDB and pgpool containers.
- Enhanced PostgreSQL image with additional extensions and custom pg_hba.conf for improved security and functionality.

database/mariadb/pam.d/mariadb

@@ -0,0 +1,6 @@
+# PAM service for MariaDB auth_pam logins (accounts created IDENTIFIED VIA pam
+# USING 'mariadb'). Authenticate + authorize against Active Directory through
+# the daemonless pam_ldap module; its connection settings live in
+# /etc/pam_ldap.conf, rendered at container start from the environment.
+auth     required   pam_ldap.so
+account  required   pam_ldap.so