feat(repetition): make champ repetition discardable

app/models/champs/repetition_champ.rb

@@ -23,6 +23,14 @@ class Champs::RepetitionChamp < Champ
     rows.last&.first&.focusable_input_id
   end
 
+  def discarded?
+    discarded_at.present?
+  end
+
+  def discard!
+    touch(:discarded_at)
+  end
+
   def search_terms
     # The user cannot enter any information here so it doesn’t make much sense to search
   end

db/migrate/20241007174301_add_discarded_at_to_champs.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddDiscardedAtToChamps < ActiveRecord::Migration[7.0]
+  def change
+    add_column :champs, :discarded_at, :datetime
+  end
+end

db/schema.rb

@@ -250,6 +250,7 @@ ActiveRecord::Schema[7.0].define(version: 2024_11_26_145420) do
   create_table "champs", id: :serial, force: :cascade do |t|
     t.datetime "created_at", precision: nil
     t.jsonb "data"
+    t.datetime "discarded_at"
     t.integer "dossier_id"
     t.integer "etablissement_id"
     t.string "external_id"