feat:바로빌 과금 정책 테이블 마이그레이션

- barobill_pricing_policies 테이블 생성
- 서비스 유형별 과금 정책 저장 (무료 제공량, 추가 과금 단위/금액)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

database/migrations/2026_01_27_160000_create_barobill_pricing_policies_table.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('barobill_pricing_policies', function (Blueprint $table) {
+            $table->id();
+            $table->string('service_type', 50)->comment('서비스 유형: card, tax_invoice, bank_account');
+            $table->string('name', 100)->comment('정책명');
+            $table->string('description')->nullable()->comment('설명');
+
+            // 기본 무료 제공량
+            $table->integer('free_quota')->default(0)->comment('무료 기본 제공량');
+            $table->string('free_quota_unit', 20)->default('개')->comment('무료 제공 단위 (장, 건, 개 등)');
+
+            // 추가 과금 설정
+            $table->integer('additional_unit')->default(1)->comment('추가 과금 단위 (1, 50 등)');
+            $table->string('additional_unit_label', 20)->default('개')->comment('추가 단위 라벨');
+            $table->integer('additional_price')->default(0)->comment('추가 과금 금액 (원)');
+
+            $table->boolean('is_active')->default(true)->comment('활성화 여부');
+            $table->integer('sort_order')->default(0)->comment('정렬 순서');
+
+            $table->timestamps();
+
+            $table->unique('service_type');
+            $table->index('is_active');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('barobill_pricing_policies');
+    }
+};