CLDC-4226: add todo comment

app/models/log.rb

@@ -50,6 +50,7 @@ class Log < ApplicationRecord
   scope :has_old_form_id, -> { where.not(old_form_id: nil) }
   scope :imported_2023_with_old_form_id, -> { imported.filter_by_year(2023).has_old_form_id }
   scope :imported_2023, -> { imported.filter_by_year(2023) }
+  # TODO: CLDC-4273: use .union in filter_by_organisation rather than raw SQL
   scope :filter_by_organisation, lambda { |orgs, _user = nil|
     owned   = unscoped.where(owning_organisation: orgs).select(:id)
     managed = unscoped.where(managing_organisation: orgs).select(:id)