Fix: Truncate country code til max 2 chars (ISO format)

app/system/backend/sync_router.py

@@ -334,6 +334,14 @@ async def sync_from_economic() -> Dict[str, Any]:
                 if len(cvr) != 8:
                     cvr = None
             
+            # Clean country code (max 2 chars for ISO codes)
+            if country:
+                country = str(country).strip().upper()[:2]
+                if not country:
+                    country = 'DK'
+            else:
+                country = 'DK'
+            
             # Extract email domain
             email_domain = email.split('@')[-1] if '@' in email else None