add medal bonus addition

database/migrations/2023_01_26_210814_add_bonus_addition_factor_to_medals_table.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('medals', function (Blueprint $table) {
+            $table->float('bonus_addition_factor')->default(0);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('medals', function (Blueprint $table) {
+            $table->dropColumn(['bonus_addition_factor']);
+        });
+    }
+};