fix:거래처 업태/종목 컬럼 크기 확장 (varchar 20/50 → 100)

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

database/migrations/2026_02_19_100000_extend_type_category_on_trading_partners_table.php

@@ -0,0 +1,24 @@
+<?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('type', 100)->default('vendor')->comment('업태')->change();
+            $table->string('category', 100)->default('기타')->comment('종목')->change();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('trading_partners', function (Blueprint $table) {
+            $table->string('type', 20)->default('vendor')->change();
+            $table->string('category', 50)->default('기타')->change();
+        });
+    }
+};