More use of tags - drop add_header action -> allow + headers+tags

db/migrate/20251118071813_add_is_bot_to_events.rb

@@ -0,0 +1,6 @@
+class AddIsBotToEvents < ActiveRecord::Migration[8.1]
+  def change
+    add_column :events, :is_bot, :boolean, default: false, null: false
+    add_index :events, :is_bot
+  end
+end