feat(BE-59,60,61): build stock transfer API with validation and audit log

internal/modules/inventory/transfers/dto/transfer.dto.go

@@ -29,9 +29,8 @@ type AreaDTO struct {
 }
 
 type LocationDTO struct {
-	Id   uint     `json:"id"`
-	Name string   `json:"name"`
-	Area *AreaDTO `json:"area"`
+	Id   uint   `json:"id"`
+	Name string `json:"name"`
 }
 
 type WarehouseDetailDTO struct {
@@ -119,11 +118,9 @@ func toLocationDTO(l *entity.Location) *LocationDTO {
 	if l == nil {
 		return nil
 	}
-	// Area selalu diisi jika l.Area ada
 	return &LocationDTO{
 		Id:   l.Id,
 		Name: l.Name,
-		Area: toAreaDTO(&l.Area),
 	}
 }
 
@@ -135,7 +132,7 @@ func toWarehouseDetailDTO(w *entity.Warehouse) *WarehouseDetailDTO {
 		Id:       w.Id,
 		Name:     w.Name,
 		Location: toLocationDTO(w.Location),
-		Area:     toAreaDTO(&w.Area),
+		Area:     toAreaDTO(&w.Area), // Ambil area langsung dari warehouse (area_id)
 	}
 }