fix : products 테이블 unit 컬럼 추가 및 excel 기능추가(composer) - composer install 및 migrate 필요

database/migrations/2025_08_26_222920_add_unit_to_products_table.php

@@ -0,0 +1,21 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up(): void
+    {
+        Schema::table('products', function (Blueprint $table) {
+            $table->string('unit', 10)->nullable()->after('name')->comment('단위');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('products', function (Blueprint $table) {
+            $table->dropColumn('unit');
+        });
+    }
+};