Make asking for missing pieces in forms optional

db/migrate/20260825071844_add_missing_pieces_to_contest.rb

@@ -0,0 +1,5 @@
+class AddMissingPiecesToContest < ActiveRecord::Migration[8.0]
+  def change
+    add_column :contests, :missing_pieces, :boolean
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2026_07_30_055752) do
+ActiveRecord::Schema[8.0].define(version: 2026_08_25_071844) do
   create_table "active_storage_attachments", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -107,6 +107,7 @@ ActiveRecord::Schema[8.0].define(version: 2026_07_30_055752) do
     t.boolean "show_stopwatch"
     t.boolean "organizer_form"
     t.integer "event_id"
+    t.boolean "missing_pieces"
     t.index ["event_id"], name: "index_contests_on_event_id"
     t.index ["slug"], name: "index_contests_on_slug", unique: true
     t.index ["user_id"], name: "index_contests_on_user_id"