Refactor: Auth & Identity System v1.4

- Fix: Resolved SQLAlchemy Mapper error for 'UserVehicle' using string-based relationships.
- Fix: Fixed Postgres Enum case sensitivity issue for 'userrole' (forcing lowercase 'user').
- Fix: Resolved ImportError for 'create_access_token' in security module.
- Feature: Implemented 2-step registration protocol (Lite Register -> KYC Step).
- Data: Added bank-level KYC fields (mother's name, ID/Driver/Boat/Pilot license expiry and categories).
- Business: Applied private fleet isolation (is_transferable=False for individual orgs).
- Docs: Updated Grand Master Book to v1.4 and added Developer Pitfalls guide.

backend/app/models/__init__.py

@@ -1,25 +1,21 @@
 from app.db.base import Base
-from .identity import User, Person, Wallet, UserRole  # ÚJ központ
-from .company import Company, CompanyMember, VehicleAssignment
+from .identity import User, Person, Wallet, UserRole
 from .organization import Organization, OrgType
 from .vehicle import (
     Vehicle, 
-    VehicleOwnership, 
     VehicleBrand, 
     EngineSpec, 
     ServiceProvider, 
     ServiceRecord,
-    VehicleCategory,
-    VehicleModel,
-    VehicleVariant
+    OrganizationMember
 )
 
-# Aliasok a kompatibilitás kedvéért
-UserVehicle = Vehicle 
+# Aliasok a kód többi részének
+UserVehicle = Vehicle
 
 __all__ = [
-    "Base", "User", "Person", "Wallet", "UserRole", "Vehicle", "VehicleOwnership", 
-    "VehicleBrand", "EngineSpec", "ServiceProvider", "ServiceRecord", "Company", 
-    "CompanyMember", "VehicleAssignment", "UserVehicle", "VehicleCategory",
-    "VehicleModel", "VehicleVariant", "Organization", "OrgType"
+    "Base", "User", "Person", "Wallet", "UserRole", 
+    "Vehicle", "UserVehicle", "VehicleBrand", "EngineSpec", 
+    "ServiceProvider", "ServiceRecord", "Organization", 
+    "OrgType", "OrganizationMember"
 ]