feat: 출퇴근 설정에 자동 출퇴근 사용 여부 필드 추가

- attendance_settings 테이블에 use_auto 컬럼 추가
- AttendanceSetting 모델에 use_auto 필드 추가 (fillable, casts, attributes)
- UpdateAttendanceSettingRequest에 use_auto 유효성 검사 추가

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

app/Models/Tenants/AttendanceSetting.php

@@ -11,6 +11,7 @@
  * @property int $id
  * @property int $tenant_id
  * @property bool $use_gps
+ * @property bool $use_auto
  * @property int $allowed_radius
  * @property string|null $hq_address
  * @property float|null $hq_latitude
@@ -25,6 +26,7 @@ class AttendanceSetting extends Model
     protected $fillable = [
         'tenant_id',
         'use_gps',
+        'use_auto',
         'allowed_radius',
         'hq_address',
         'hq_latitude',
@@ -33,6 +35,7 @@ class AttendanceSetting extends Model
 
     protected $casts = [
         'use_gps' => 'boolean',
+        'use_auto' => 'boolean',
         'allowed_radius' => 'integer',
         'hq_latitude' => 'decimal:8',
         'hq_longitude' => 'decimal:8',
@@ -40,6 +43,7 @@ class AttendanceSetting extends Model
 
     protected $attributes = [
         'use_gps' => false,
+        'use_auto' => false,
         'allowed_radius' => 100,
     ];