Removed uneccessary suffixes

order/model/order.go

@@ -2,13 +2,13 @@ package order
 
 import "time"
 
-type OrderModel struct {
+type Order struct {
 	State     string    `db:"state" json:"state"`
 	CreatedAt time.Time `db:"created_at" json:"created_at"`
 	UpdatedAt time.Time `db:"updated_at" json:"updated_at,omitempty"`
 }
 
-type OrderItemModel struct {
+type OrderItem struct {
 	OrderID   string    `db:"order_id" json:"order_id"`
 	ProductID int       `db:"product_id" json:"product_id"`
 	Quantity  int       `db:"quantity" json:"quantity"`