feat:카드 사용내역 금액 수정 마이그레이션 추가

- modified_supply_amount, modified_tax 컬럼 추가 (사용자 수정 공급가액/부가세)
- barobill_card_transaction_amount_logs 이력 테이블 생성

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

database/migrations/2026_02_05_200000_add_modified_amount_fields_to_barobill_card_transactions_table.php

@@ -0,0 +1,31 @@
+<?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::table('barobill_card_transactions', function (Blueprint $table) {
+            $table->decimal('modified_supply_amount', 18, 2)->nullable()->after('tax')
+                ->comment('사용자 수정 공급가액 (null이면 원본값 사용)');
+            $table->decimal('modified_tax', 18, 2)->nullable()->after('modified_supply_amount')
+                ->comment('사용자 수정 부가세 (null이면 원본값 사용)');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('barobill_card_transactions', function (Blueprint $table) {
+            $table->dropColumn(['modified_supply_amount', 'modified_tax']);
+        });
+    }
+};

database/migrations/2026_02_05_200100_create_barobill_card_transaction_amount_logs_table.php

@@ -0,0 +1,40 @@
+<?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_card_transaction_amount_logs', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('card_transaction_id')->constrained('barobill_card_transactions')->onDelete('cascade')
+                ->comment('카드 거래 ID');
+            $table->string('original_unique_key', 255)->comment('거래 고유키 (cardNum|useDt|approvalNum|amount)');
+            $table->decimal('before_supply_amount', 18, 2)->comment('변경 전 공급가액');
+            $table->decimal('before_tax', 18, 2)->comment('변경 전 부가세');
+            $table->decimal('after_supply_amount', 18, 2)->comment('변경 후 공급가액');
+            $table->decimal('after_tax', 18, 2)->comment('변경 후 부가세');
+            $table->unsignedBigInteger('modified_by')->nullable()->comment('수정자 ID');
+            $table->string('modified_by_name', 100)->nullable()->comment('수정자 이름');
+            $table->string('ip_address', 45)->nullable()->comment('수정자 IP');
+            $table->timestamp('created_at')->useCurrent()->comment('수정 시각');
+
+            $table->index('card_transaction_id', 'bb_amount_log_trans_idx');
+            $table->index('original_unique_key', 'bb_amount_log_key_idx');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('barobill_card_transaction_amount_logs');
+    }
+};