feat: 대시보드에 라이선스 만료 요약 및 Lookup 데이터 캐싱 시스템 구현

- License Expiry Summary API 연동 완료
  - 30/60/90일 내 만료 예정 라이선스 요약 표시
  - 대시보드 상단에 알림 카드로 통합
  - 만료 임박 순서로 색상 구분 (빨강/주황/노랑)

- Lookup 데이터 전역 캐싱 시스템 구축
  - LookupService 및 RemoteDataSource 생성
  - 전체 lookup 데이터 일괄 로드 및 캐싱
  - 타입별 필터링 지원

- 새로운 모델 추가
  - LicenseExpirySummary (Freezed)
  - LookupData, LookupCategory, LookupItem 모델

- CLAUDE.md 문서 업데이트
  - 미사용 API 활용 계획 추가
  - 구현 우선순위 정의

🤖 Generated with Claude Code

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

lib/data/models/dashboard/license_expiry_summary.g.dart

@@ -0,0 +1,61 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'license_expiry_summary.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$LicenseExpirySummaryImpl _$$LicenseExpirySummaryImplFromJson(
+        Map<String, dynamic> json) =>
+    _$LicenseExpirySummaryImpl(
+      within30Days: (json['within_30_days'] as num).toInt(),
+      within60Days: (json['within_60_days'] as num).toInt(),
+      within90Days: (json['within_90_days'] as num).toInt(),
+      expired: (json['expired'] as num).toInt(),
+      totalActive: (json['total_active'] as num).toInt(),
+      licenses: (json['licenses'] as List<dynamic>)
+          .map((e) => LicenseExpiryDetail.fromJson(e as Map<String, dynamic>))
+          .toList(),
+    );
+
+Map<String, dynamic> _$$LicenseExpirySummaryImplToJson(
+        _$LicenseExpirySummaryImpl instance) =>
+    <String, dynamic>{
+      'within_30_days': instance.within30Days,
+      'within_60_days': instance.within60Days,
+      'within_90_days': instance.within90Days,
+      'expired': instance.expired,
+      'total_active': instance.totalActive,
+      'licenses': instance.licenses,
+    };
+
+_$LicenseExpiryDetailImpl _$$LicenseExpiryDetailImplFromJson(
+        Map<String, dynamic> json) =>
+    _$LicenseExpiryDetailImpl(
+      id: (json['id'] as num).toInt(),
+      equipmentId: (json['equipment_id'] as num).toInt(),
+      equipmentName: json['equipment_name'] as String,
+      serialNumber: json['serial_number'] as String,
+      companyName: json['company_name'] as String,
+      licenseType: json['license_type'] as String,
+      startDate: json['start_date'] as String,
+      endDate: json['end_date'] as String,
+      daysRemaining: (json['days_remaining'] as num).toInt(),
+      isExpired: json['is_expired'] as bool,
+    );
+
+Map<String, dynamic> _$$LicenseExpiryDetailImplToJson(
+        _$LicenseExpiryDetailImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'equipment_id': instance.equipmentId,
+      'equipment_name': instance.equipmentName,
+      'serial_number': instance.serialNumber,
+      'company_name': instance.companyName,
+      'license_type': instance.licenseType,
+      'start_date': instance.startDate,
+      'end_date': instance.endDate,
+      'days_remaining': instance.daysRemaining,
+      'is_expired': instance.isExpired,
+    };