perf: do a bulk insert in fetchCollection

Improve performance over inserting each item individually

pkg/collection.go

@@ -28,6 +28,20 @@ type Collection struct {
 	childs []*Node // Child nodes
 }
 
+// NewCollectionObject creates a new Collection instance without persisting it to the database.
+// This is useful when you want to prepare a Collection for later storage.
+func NewCollection(name string, metadata []byte) *Collection {
+	return &Collection{
+		Node: Node{
+			name:     name,
+			_class:   "COLLECTION",
+			metadata: metadata,
+			Id:       -1, // Use -1 to indicate not persisted
+		},
+		childs: make([]*Node, 0),
+	}
+}
+
 // Internal RelationshipClass to handle the collection to node relationship
 type collection_relation struct{}