Follow the approach in PR #68 (PostgreSQL XA support) to add XA (distributed transaction) support for MariaDB in the integration test suite.

What to do:

• Update the XADataSourceFactory to fully implement createMariaDBXADataSource (see how it's done for PostgreSQL in the PR)
• Update MariaDB integration tests: parameterize with both isXA=false and isXA=true in the relevant CSV files and test classes, as done for PostgreSQL
• Ensure tests use TestDBUtils.createConnection() to properly handle XA
• Validate XA functionality by running the tests in both JDBC and XA modes

References:

• PostgreSQL implementation: PR #68
• XA support guide

Keep the issue focused on MariaDB only. Use the links above for detailed instructions and examples.