Catalog Entity, Model and DTO fields updated

catalog/dto/product.go

@@ -9,9 +9,9 @@ type GetProductRequestDTO struct {
 }
 
 type GetProductResponseDTO struct {
-	ID        int           `json:"id"`
-	PID       string        `json:"pid"`
+	ID        string        `json:"id"`
 	Name      string        `json:"name"`
+	Slug      string        `json:"slug"`
 	Price     float64       `json:"price"`
 	CreatedAt time.Duration `json:"created_at"`
 	UpdatedAt time.Duration `json:"updated_at,omitempty"`