add more virtual methods for base handler

Pilz.Net/Api/Server/BaseItemHandler.cs

@@ -26,15 +26,22 @@ public abstract class BaseItemHandler<TEntity, TUpdateMsg>(IApiServer server)
 
     public virtual ApiResult GetAll()
     {
-        return server.Manager.Get<TEntity>().ToList().Select(ToClient).ToItemsResult();
+        return SortEntities(server.Manager.Get<TEntity>()).ToList().Select(ToClient).ToItemsResult();
     }
 
     public virtual ApiResult Post(TUpdateMsg msg, ApiRequestInfo req)
     {
         var entity = CreateNewEntity(msg);
-        if (UpdateEntity(new(entity, msg, req)) is ApiResult result)
+        var update = new EntityUpdate(entity, msg, req);
+        if (UpdateEntity(update) is ApiResult result)
             return result;
-        server.Manager.Save(entity, true);
+        if (OnSave(update) is ApiResult result2)
+            return result2;
         return ToClient(entity).ToItemResult(HttpStatusCode.Created);
     }
+
+    protected virtual IQueryable<TEntity> SortEntities(IQueryable<TEntity> entities)
+    {
+        return entities;
+    }
 }