feat: allow to fetch nodes

pkg/node.go

@@ -20,6 +20,15 @@ type Node struct {
 	metadata       []byte          // Arbitrary data. This is stored as a jsonb in the database
 }
 
+func NewNode(name string, metadata []byte) *Node {
+	return &Node{
+		name:     name,
+		_class:   "COLLECTION",
+		metadata: metadata,
+		Id:       -1, // Use -1 to indicate not persisted
+	}
+}
+
 func (node *Node) GetClass() string {
 	return node._class
 }