- Added CustomerConsistencyService to compare and sync customer data.
- Introduced new API endpoints for data consistency checks and field synchronization.
- Enhanced customer detail page with alert for discrepancies and modal for manual syncing.
- Updated vTiger and e-conomic services to support fetching and updating customer data.
- Added configuration options for enabling/disabling sync operations and automatic checks.
- Implemented data normalization and error handling for robust comparisons.
- Documented the new system and its features in DATA_CONSISTENCY_SYSTEM.md.
