Cra175

Summary by Bito

This PR enhances the codebase by updating configuration in .bito.yaml, implementing a DataHandler class with streamlined conversion logic, and improving BookServiceImpl with better resource management. It also fixes critical issues in exception handling and database connectivity, ensuring StoreException returns proper errorCodes and DBUtil returns actual connections rather than null, improving overall error management and database reliability.

Unit tests added: False

Estimated effort to review (1-5, lower is better): 1