Code Review

This pull request introduces a new Databricks plugin module, including a batch source, database connector, configuration classes, documentation, widgets, and unit tests. It also updates the database-commons module to support custom auto-commit and transaction isolation levels. The review feedback highlights several critical improvements: preventing potential NullPointerExceptions when the connection configuration or column names are null, handling unsupported transaction isolation levels gracefully instead of throwing RuntimeExceptions, and implementing actual random sampling in the getRandomQuery method using ORDER BY rand().