improvements for ordering favs

lib/tasks/stats.rake

@@ -67,7 +67,7 @@ namespace :stats do
     puts "\n✅ Graph generation completed!"
 
     # remove old regressions for this model
-    model_name = "fa_user_post_fav_inferred_time"
+    model_name = "fa_fav_id_and_date"
     TrainedRegressionModel.where(name: model_name).destroy_all
 
     # Save each regression model to the database