Major overhaul of drop-and-recreate-database.sh, DDL schema updates,
seed data cleanup. Add utility scripts for auth table fixes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add contrato_addendas table for contract addendums/modifications
- Includes workflow status, amount changes, date extensions
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>