User Organization Transfer Ownership Create

POST /api/users/organization/<unique_organization_id>/transfer-ownership/ - Transfer organization ownership Transfers ownership of an organization from the current owner to another member. Only the current owner can initiate this transfer. Request Body: - new_owner_id (int, optional): ID of the new owner - new_owner_email (string, optional): Email of the new owner - Exactly one of new_owner_id or new_owner_email must be provided Response (200 OK): { "message": "Ownership transferred successfully", "organization_id": 123, "new_owner_id": 456, "new_owner_email": "newowner@example.com" } Error Responses: - 400: Invalid request (validation errors, cannot transfer to current owner) - 403: User is not the organization owner - 404: Organization not found, or new owner not found/not a member