finish setup insert method, refactor sql migration file

internal/foundry/temp_models/json/folder.go

@@ -10,17 +10,20 @@ type Folder struct {
 	Folders []*Folder `json:"folders,omitempty"`
 }
 
-func (f *Folder) ToDB(dest *db.Folder) bool {
+func (f *Folder) ToDB(dest **db.Folder) bool {
 	if dest == nil {
 		return false
 	}
 
-	dest.Name = f.Name
-	dest.Sorting = f.Sorting
-	dest.Color = f.Color
-	copy(dest.Packs, f.Packs)
+	folder := &db.Folder{
+		Name:    f.Name,
+		Sorting: f.Sorting,
+		Color:   f.Color,
+	}
+	copy(folder.Packs, f.Packs)
+	CopySliceToDB(&folder.Folders, f.Folders)
 
-	CopySliceToDB(&dest.Folders, f.Folders)
+	*dest = folder
 
 	return true
 }