Fix: #950 新規アンテナ作成時にリストへ挿入するを設定しても、ホーム挿入になる (#975)

* Fix: #950 新規アンテナ作成時にリストへ挿入するを設定しても、ホーム挿入になる

* Fix test

db/migrate/20250130232529_set_antenna_list_id_default_value.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class SetAntennaListIdDefaultValue < ActiveRecord::Migration[8.0]
+  def change
+    change_column_default :antennas, :list_id, from: nil, to: 0
+  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: 2025_01_23_091137) do
+ActiveRecord::Schema[8.0].define(version: 2025_01_30_232529) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
 
@@ -309,7 +309,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_01_23_091137) do
 
   create_table "antennas", force: :cascade do |t|
     t.bigint "account_id", null: false
-    t.bigint "list_id", null: false
+    t.bigint "list_id", default: 0, null: false
     t.string "title", default: "", null: false
     t.jsonb "keywords"
     t.jsonb "exclude_keywords"