- Replace literal setupSql strings with structured columns/rows model
- Add SqlColumn interface and updated SqlTablePreset with columns/rows arrays
- Implement toSqlLiteral() for value escaping and buildSetupSql() for SQL generation
- Update sqlTable.ts to call buildSetupSql() instead of accessing setupSql field
- Maintains data parity with existing tables (students, employees, products)
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>