feat: sam_stat P1 도메인 확장 (Phase 3)

- 차원 테이블: dim_client, dim_product 마이그레이션 + SCD Type 2 동기화 (DimensionSyncService)
- 재고 통계: stat_inventory_daily + InventoryStatService (stocks, stock_transactions, inspections)
- 견적/영업 통계: stat_quote_pipeline_daily + QuoteStatService (quotes, biddings, sales_prospects)
- 인사/근태 통계: stat_hr_attendance_daily + HrStatService (attendances, leaves, user_tenants)
- KPI/알림: stat_kpi_targets, stat_alerts + KpiAlertService + StatCheckKpiAlertsCommand
- StatAggregatorService에 inventory, quote, hr 도메인 추가 (총 6개 도메인)
- 스케줄러: stat:check-kpi-alerts 매일 09:00 등록

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

routes/console.php

@@ -119,3 +119,14 @@
     ->onFailure(function () {
         \Illuminate\Support\Facades\Log::error('❌ stat:aggregate-monthly 스케줄러 실행 실패', ['time' => now()]);
     });
+
+// 매일 오전 09:00에 KPI 목표 대비 알림 체크
+Schedule::command('stat:check-kpi-alerts')
+    ->dailyAt('09:00')
+    ->appendOutputTo(storage_path('logs/scheduler.log'))
+    ->onSuccess(function () {
+        \Illuminate\Support\Facades\Log::info('✅ stat:check-kpi-alerts 스케줄러 실행 성공', ['time' => now()]);
+    })
+    ->onFailure(function () {
+        \Illuminate\Support\Facades\Log::error('❌ stat:check-kpi-alerts 스케줄러 실행 실패', ['time' => now()]);
+    });