BREAKING CHANGES:
- vTiger sync: Never overwrites existing vtiger_id
- Contact sync: REPLACES links instead of appending (idempotent)
- E-conomic sync: Only updates fields it owns (address, city, postal, email_domain, website)
- E-conomic sync: Does NOT overwrite name or cvr_number anymore
ARCHITECTURE:
- Each data source owns specific fields
- Sync operations are now idempotent (can run multiple times)
- Clear documentation of field ownership in sync_router.py
- Contact links deleted and recreated on sync to match vTiger state
FIXED:
- Contact relationships now correct after re-sync
- No more mixed customer data from different sources
- Sorting contacts by company_count DESC (companies first)
- Added address field to UPDATE query in economic sync
- Added address field to INSERT query for new customers
- Fixes issue where address from e-conomic was not synced
- Prevents mixed data (København address with Lundby city/postal)
- Address is now synced along with city, postal_code, country
- Fixed UPDATE query to include economic_customer_number field
- Previously only set on INSERT, not UPDATE when matching by CVR
- Now e-conomic customer number is always synced as source of truth
- Fixes issue where customers synced from e-conomic were missing customer numbers
- Add Sync navigation tab in settings
- Sync UI with status cards (total, vTiger, e-conomic)
- Action cards for vTiger and e-conomic sync
- Sync log with real-time updates
- JavaScript functions for sync operations
- Backend sync router with vTiger account sync
- Backend vTiger contacts sync with customer linking
- Placeholder for e-conomic sync (needs get_customers method)
- Name normalization for company matching
- CVR number matching and validation
