fix: use fahrzeuge_mit_pruefstatus view in notification job to resolve missing naechste_pruefung_tage column

backend/src/jobs/notification-generation.job.ts

@@ -174,7 +174,7 @@ async function generateVehicleNotifications(): Promise<void> {
         '/fahrzeuge/' || f.id::text,
         'fahrzeug-pruefung-' || f.id::text,
         'fahrzeug_pruefung'
-      FROM fahrzeuge f
+      FROM fahrzeuge_mit_pruefstatus f
       CROSS JOIN users u
       WHERE f.deleted_at IS NULL
         AND f.naechste_pruefung_tage IS NOT NULL