feat:거래처 테이블에 대표자(ceo), 주소(address) 컬럼 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

database/migrations/2026_02_13_150000_add_ceo_address_to_trading_partners_table.php

@@ -0,0 +1,23 @@
+<?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('trading_partners', function (Blueprint $table) {
+            $table->string('ceo', 50)->nullable()->after('biz_no')->comment('대표자');
+            $table->string('address', 255)->nullable()->after('email')->comment('주소');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('trading_partners', function (Blueprint $table) {
+            $table->dropColumn(['ceo', 'address']);
+        });
+    }
+};