add cron and partial update refund schema

server/services/trip.service.ts

@@ -385,6 +385,20 @@ export const tripService = {
     return bookingService.markPaidManual(booking.id, userId);
   },
 
+  /**
+   * Auto-complete trip yang sudah lewat. Dipakai cron harian.
+   *
+   * Cutoff = start of today UTC. Trip dengan endDate < cutoff (atau, kalau
+   * endDate null, date < cutoff) di-set status COMPLETED — selama statusnya
+   * masih OPEN/FULL. CLOSED trip tidak disentuh (organizer eksplisit batalkan).
+   *
+   * Idempotent: dua kali run di hari sama, run kedua nge-match 0 row.
+   */
+  async autoCompletePastTrips() {
+    const cutoff = utcStartOfDay(new Date());
+    return tripRepo.bulkCompletePastTrips(cutoff);
+  },
+
   async confirmParticipantPayment(
     tripId: string,
     participantId: string,