feat:바로빌 회원사 마지막 수집 시간 컬럼 추가

- last_sales_fetch_at: 마지막 매출 조회 시간
- last_purchases_fetch_at: 마지막 매입 조회 시간

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

database/migrations/2026_02_03_091006_add_last_fetch_columns_to_barobill_members_table.php

@@ -0,0 +1,29 @@
+<?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_members', function (Blueprint $table) {
+            $table->timestamp('last_sales_fetch_at')->nullable()->comment('마지막 매출 조회 시간');
+            $table->timestamp('last_purchases_fetch_at')->nullable()->comment('마지막 매입 조회 시간');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('barobill_members', function (Blueprint $table) {
+            $table->dropColumn(['last_sales_fetch_at', 'last_purchases_fetch_at']);
+        });
+    }
+};