changes

apps/edr-freight-api/src/modules/train-sets/entities/train-set-wagon.entity.ts

@@ -55,6 +55,17 @@ export class TrainSetWagon extends BaseEntity {
   @Column({ name: 'status', type: 'varchar', length: 20, default: 'PLANNED' })
   status!: string;
 
+  // ── Leg occupancy (segment corridor bookings) ──────────────────────────────
+  // A slot may occupy only part of the route: it boards (attaches/loads) at
+  // board_yard_id and alights (unloads/detaches) at alight_yard_id. NULL on both
+  // means the slot rides the whole route (legacy full-route bookings). Slots
+  // whose legs don't overlap coexist without consuming each other's capacity.
+  @Column({ name: 'board_yard_id', type: 'uuid', nullable: true })
+  boardYardId?: string | null;
+
+  @Column({ name: 'alight_yard_id', type: 'uuid', nullable: true })
+  alightYardId?: string | null;
+
   @OneToMany(() => WagonBookingAllocation, (allocation) => allocation.trainSetWagon)
   allocations?: WagonBookingAllocation[];
 }