feat(rule-engine): add yard_locations table, seed 5 facility yard GPS coords

apps/edr-freight-api/src/modules/rule-engine/entities/yard-location.entity.ts

@@ -0,0 +1,26 @@
+import { BaseEntity } from '@edr/api-common';
+import { Column, Entity, Index, JoinColumn, OneToOne } from 'typeorm';
+
+import { Yard } from './yard.entity';
+
+/**
+ * GPS position of a yard (decimal degrees, WGS84). One record per yard;
+ * today only the five facility yards (Sebeta, GMP/Indode, Mojo, Adama,
+ * Dire Dawa) are seeded.
+ */
+@Entity({ schema: 'freight', name: 'yard_locations' })
+@Index(['yardId'], { unique: true })
+export class YardLocation extends BaseEntity {
+  @Column({ name: 'yard_id', type: 'uuid' })
+  yardId!: string;
+
+  @OneToOne(() => Yard, { nullable: false, onDelete: 'CASCADE' })
+  @JoinColumn({ name: 'yard_id' })
+  yard?: Yard;
+
+  @Column({ name: 'latitude', type: 'double precision' })
+  latitude!: number;
+
+  @Column({ name: 'longitude', type: 'double precision' })
+  longitude!: number;
+}