fix(dossier): normalize champs commune data

lib/tasks/deployment/20230407132756_normalize_communes.rake

@@ -0,0 +1,21 @@
+namespace :after_party do
+  desc 'Deployment task: normalize_communes'
+  task normalize_communes: :environment do
+    puts "Running deploy task 'normalize_communes'"
+
+    champs = Champs::CommuneChamp.where.not(external_id: nil)
+    progress = ProgressReport.new(champs.count)
+
+    champs.pluck(:id).in_groups_of(10_000, false) do |champ_ids|
+      Migrations::NormalizeCommunesJob.perform_later(champ_ids)
+      progress.inc(champ_ids.count)
+    end
+
+    progress.finish
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord
+      .create version: AfterParty::TaskRecorder.new(__FILE__).timestamp
+  end
+end