feat: stabilize KYC, international assets and multi-currency schema

- Split mother's name in KYC (last/first)
- Added mileage_unit and fuel_type to Assets
- Expanded AssetCost for international VAT and original currency
- Fixed SQLAlchemy IndexError in asset catalog lookup
- Added exchange_rate and ratings tables to models

backend/app/api/v1/endpoints/catalog.py

@@ -2,7 +2,7 @@ from fastapi import APIRouter, Depends, Query
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy import select, or_
 from app.db.session import get_db
-from app.models.vehicle import VehicleCatalog
+from app.models import AssetCatalog
 from typing import List
 
 router = APIRouter()