- Added ContactCompanyLink model for linking contacts to companies with primary role handling.
- Implemented endpoint to link contacts to companies, including conflict resolution for existing links.
- Updated auth service to support additional password hashing schemes.
- Improved sag creation and update processes with new fields and validation for status.
- Enhanced UI for user and group management, including modals for group assignment and permissions.
- Introduced new product catalog and improved sales item structure for better billing and aggregation.
- Added recursive aggregation logic for financial calculations in cases.
- Implemented strict status lifecycle for billing items to prevent double-billing.
