Implement clearance-first booking flow and completion process for customs contracts

apps/edr-freight-api/src/modules/train-scheduling/booking-notifier.service.ts

@@ -141,6 +141,22 @@ export class BookingNotifierService {
     this.inApp(b, 'Payment window expired', msg);
   }
 
+  /**
+   * Every train on the booking's chosen day filled up (or no further train runs)
+   * before the waiting list reached this booking — it expired unplaced. HIGH so
+   * the customer hears about it by email/SMS and rebooks another day.
+   */
+  expiredNoCapacity(b: Booking): void {
+    const msg =
+      `Booking ${b.reference ?? b.id} could not be placed: every train for your selected day ` +
+      `is full and no other train is scheduled that day. The booking has expired — ` +
+      `please rebook for another day. No re-approval is needed.`;
+    void this.notifyContact(b, msg, 'EXPIRED (NO CAPACITY)');
+    this.inApp(b, 'No capacity — booking expired', msg, {
+      priority: NotificationPriority.HIGH,
+    });
+  }
+
   scheduleFull(b: Booking): void {
     this.logger.warn(
       `SCHEDULE FULL — ${this.ref(b)} could not be placed; change schedule, pick another day, or cancel.`,