implement intercity booking management and booking window websocket integration

apps/edr-freight-api/src/modules/routes/entities/route.entity.ts

@@ -1,4 +1,5 @@
 import { BaseEntity } from '@edr/api-common';
+import type { ScheduleTradeDirection } from '@edr/types';
 import { Column, Entity, Index, JoinColumn, ManyToOne, OneToMany } from 'typeorm';
 
 import { Yard } from '../../rule-engine/entities/yard.entity';
@@ -26,6 +27,14 @@ export class Route extends BaseEntity {
   @Column({ name: 'status', type: 'varchar', length: 32, default: 'AVAILABLE' })
   status!: RouteStatus;
 
+  /**
+   * Trade direction frozen from the yard countries at create/update
+   * (ET→DJ = EXPORT, DJ→ET = IMPORT, same country = DOMESTIC/"Intercity").
+   * Consumers (scheduling, booking windows) read this instead of re-deriving.
+   */
+  @Column({ name: 'direction', type: 'varchar', length: 10 })
+  direction!: ScheduleTradeDirection;
+
   @OneToMany(() => RouteMilestone, (milestone) => milestone.route, { cascade: false })
   milestones?: RouteMilestone[];
 }