add override for post creation in importer

script/import_scripts/base.rb

@@ -364,6 +364,10 @@ class ImportScripts::Base
     new_category
   end
 
+  def created_post(post)
+    # override if needed
+  end
+
   # Iterates through a collection of posts to be imported.
   # It can create topics and replies.
   # Attributes will be passed to the PostCreator.
@@ -396,6 +400,8 @@ class ImportScripts::Base
                 url: new_post.url,
               }
 
+              created_post(new_post)
+
               created += 1
             else
               skipped += 1