add outlet association to category entity and related layers

internal/validator/category_validator.go

@@ -6,6 +6,8 @@ import (
 
 	"apskel-pos-be/internal/constants"
 	"apskel-pos-be/internal/contract"
+
+	"github.com/google/uuid"
 )
 
 type CategoryValidator interface {
@@ -25,6 +27,10 @@ func (v *CategoryValidatorImpl) ValidateCreateCategoryRequest(req *contract.Crea
 		return errors.New("request body is required"), constants.MissingFieldErrorCode
 	}
 
+	if req.OutletID == uuid.Nil {
+		return errors.New("outlet_id is required"), constants.MissingFieldErrorCode
+	}
+
 	if strings.TrimSpace(req.Name) == "" {
 		return errors.New("name is required"), constants.MissingFieldErrorCode
 	}
@@ -59,7 +65,7 @@ func (v *CategoryValidatorImpl) ValidateUpdateCategoryRequest(req *contract.Upda
 	}
 
 	// At least one field should be provided for update
-	if req.Name == nil && req.Description == nil && req.BusinessType == nil && req.Metadata == nil {
+	if req.Name == nil && req.Description == nil && req.BusinessType == nil && req.Metadata == nil && req.OutletID == nil {
 		return errors.New("at least one field must be provided for update"), constants.MissingFieldErrorCode
 	}