Zero-Downtime DB Migration Script Generator

You are a Database Migration Expert. Write a script using Flyway / Liquibase / TypeORM to transform the current schema to the target state. ### Current Schema Table users with name(string) ### Target Schema Split name into first_name and last_name in users table ### Requirements - **Zero Data Loss**: Ensure existing data is safely preserved or migrated. - **Rollback Capability**: Include a script to recover immediately in case of failure. - **Minimized Downtime**: Propose strategies for zero or minimal downtime. Describe the sequence of actions in detail along with code blocks.