complete rule engine and booking flow

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

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+import { BaseEntity } from '@edr/api-common';
+import { Column, Entity, Index, JoinColumn, ManyToOne } from 'typeorm';
+import { ContainerType } from './container-type.entity';
+
+export const RATE_TYPES = [
+  'CONTAINER_IMPORT',
+  'CONTAINER_EXPORT',
+  'BULK_IMPORT',
+  'BULK_EXPORT',
+  'INTERCITY_BULK',
+  'INTERCITY_CONTAINER',
+  'FIRST_MILE',
+  'LAST_MILE',
+  'DEMURRAGE',
+  'LASHING',
+  'DOUBLE_HANDLING',
+  'CONTAINER_WITH_RETURN',
+  'CANCELLATION_FEE',
+  'OVERWEIGHT_PER_TON',
+  'HAZARD_SURCHARGE',
+  'REEFER_SURCHARGE',
+  'PIL_EXTRA_FEE',
+] as const;
+
+export type RateType = typeof RATE_TYPES[number];
+
+export const RATE_STATUSES = ['DRAFT', 'PENDING_APPROVAL', 'LIVE', 'SUPERSEDED'] as const;
+export type RateStatus = typeof RATE_STATUSES[number];
+
+export const RATE_UNITS = ['PER_WAGON', 'PER_TON', 'PER_CONTAINER', 'PER_KM', 'FLAT'] as const;
+export type RateUnit = typeof RATE_UNITS[number];
+
+@Entity({ schema: 'freight', name: 'rates' })
+@Index(['rateType'])
+@Index(['status'])
+@Index(['effectiveFrom'])
+@Index(['containerTypeId'])
+export class Rate extends BaseEntity {
+  @Column({ name: 'rate_type', type: 'varchar', length: 50 })
+  rateType!: RateType;
+
+  @Column({ name: 'container_type_id', type: 'uuid', nullable: true })
+  containerTypeId?: string | null;
+
+  @ManyToOne(() => ContainerType, { nullable: true, eager: false })
+  @JoinColumn({ name: 'container_type_id' })
+  containerType?: ContainerType | null;
+
+  @Column({ name: 'trade_direction', type: 'varchar', length: 10, nullable: true })
+  tradeDirection?: string | null;
+
+  @Column({ name: 'currency', type: 'varchar', length: 5 })
+  currency!: string;
+
+  @Column({ name: 'rate_value', type: 'numeric', precision: 14, scale: 4 })
+  rateValue!: number;
+
+  @Column({ name: 'rate_unit', type: 'varchar', length: 30 })
+  rateUnit!: RateUnit;
+
+  @Column({ name: 'status', type: 'varchar', length: 20, default: 'DRAFT' })
+  status!: RateStatus;
+
+  @Column({ name: 'proposed_by_staff_id', type: 'uuid' })
+  proposedByStaffId!: string;
+
+  @Column({ name: 'approved_by_ceo_id', type: 'uuid', nullable: true })
+  approvedByCeoId?: string | null;
+
+  @Column({ name: 'approved_at', type: 'timestamptz', nullable: true })
+  approvedAt?: Date | null;
+
+  @Column({ name: 'effective_from', type: 'date' })
+  effectiveFrom!: Date;
+
+  @Column({ name: 'effective_to', type: 'date', nullable: true })
+  effectiveTo?: Date | null;
+}