feat: I-3 법인카드 사용내역 API 구현

- CardTransactionController: 카드 거래내역 조회 API
- CardTransactionService: 카드 거래 조회 로직
- Withdrawal 모델 카드 필드 확장
- Swagger 문서화
- withdrawals 테이블 카드 필드 마이그레이션

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

database/migrations/2025_12_26_133933_add_card_fields_to_withdrawals_table.php

@@ -0,0 +1,35 @@
+<?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('withdrawals', function (Blueprint $table) {
+            // 카드 관련 필드 추가
+            $table->unsignedBigInteger('card_id')->nullable()->after('bank_account_id')->comment('카드 ID');
+            $table->string('merchant_name', 100)->nullable()->after('client_name')->comment('가맹점명 (카드 결제시)');
+            $table->timestamp('used_at')->nullable()->after('withdrawal_date')->comment('사용일시 (카드 결제시)');
+
+            // 인덱스
+            $table->index('card_id', 'idx_card');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('withdrawals', function (Blueprint $table) {
+            $table->dropIndex('idx_card');
+            $table->dropColumn(['card_id', 'merchant_name', 'used_at']);
+        });
+    }
+};