fix(demo): invalidate paginated caches after seeding

Invalidate tenant read-model caches after generating demo data so seeded users, classes and assignments appear immediately in the UI.

backend/src/Administration/Infrastructure/Service/DemoDataGenerator.php

@@ -6,6 +6,7 @@ namespace App\Administration\Infrastructure\Service;
 
 use App\Administration\Application\Port\OfficialCalendarProvider;
 use App\Administration\Application\Port\PasswordHasher;
+use App\Administration\Application\Service\Cache\PaginatedQueryCache;
 use App\Administration\Domain\Model\AcademicYear\DefaultPeriods;
 use App\Administration\Domain\Model\AcademicYear\PeriodType;
 use App\Administration\Domain\Model\ClassAssignment\ClassAssignment;
@@ -69,6 +70,7 @@ final readonly class DemoDataGenerator
         private \App\Administration\Domain\Model\SchoolCalendar\SchoolCalendarRepository $schoolCalendarRepository,
         private GradingConfigurationRepository $gradingConfigurationRepository,
         private PasswordHasher $passwordHasher,
+        private PaginatedQueryCache $paginatedQueryCache,
         private Clock $clock,
         private TenantContext $tenantContext,
         private CurrentAcademicYearResolver $currentAcademicYearResolver,
@@ -114,6 +116,7 @@ final readonly class DemoDataGenerator
             $this->seedTeacherAssignments($tenantId, $academicYearId, $users, $classes, $subjects, $now, $result);
             $this->seedStudentGuardianLinks($tenantId, $users, $now, $result);
             $this->seedScheduleSlots($tenantId, $classes, $subjects, $users, $academicYearStartYear, $now, $result);
+            $this->invalidateReadModelCaches((string) $tenantId);
 
             return $result;
         } finally {
@@ -667,6 +670,20 @@ final readonly class DemoDataGenerator
         return $startYear;
     }
 
+    private function invalidateReadModelCaches(string $tenantId): void
+    {
+        foreach ([
+            'users',
+            'classes',
+            'subjects',
+            'assignments',
+            'parent_invitations',
+            'students_image_rights',
+        ] as $entityType) {
+            $this->paginatedQueryCache->invalidate($entityType, $tenantId);
+        }
+    }
+
     private function emailFor(string $emailSlug, string $subdomain): string
     {
         return sprintf('%s.%s@classeo.test', strtolower($emailSlug), strtolower($subdomain));