feat: let admins notify all users about updated access codes

tests/Service/AuditLoggerTest.php

@@ -180,6 +180,14 @@ class AuditLoggerTest extends TestCase
         self::assertSame(7, $records[2]->context['access_code_id']);
     }
 
+    public function testAnAnnouncementIsRecordedWithItsCounts(): void
+    {
+        $this->audit->accessCodesAnnounced(50, 1);
+
+        self::assertSame('Access code update announced.', $this->record()->message);
+        self::assertSame(['sent' => 50, 'failed' => 1], $this->record()->context);
+    }
+
     private function record(): LogRecord
     {
         return $this->handler->getRecords()[0];