fix: correct AfterLoad if no save

Author: Tr0sT

Packages/com.nuclearband.sodatabase/Runtime/SODatabase.cs

@@ -156,8 +156,11 @@ public static async void Load()
 
         public static async Task LoadAsync()
         {
-            if (!File.Exists(SavePath))
+            if (!File.Exists(SavePath)) {
+                foreach (var dataNode in DataNodes(root))
+                    dataNode.AfterLoad();
                 return;
+            }
 
             using var fileStream = new StreamReader(SavePath);
             var serializedDictionary = await fileStream.ReadToEndAsync();