add yard distances management to rule engine

- Introduced new yard distances resource with CRUD operations.
- Created migration for yard distances table with necessary constraints.
- Implemented service and repository for yard distances handling.
- Added controller for API endpoints to manage yard distances.
- Updated rule engine configuration to include yard distances.
- Enhanced rule engine resource page to support yard distance selection.
- Updated contracts and train builder pages to handle new yard distance logic.
- Added error handling utility for better error message extraction.

apps/edr-freight-api/src/modules/rule-engine/dto/create-yard-distance.dto.ts

@@ -0,0 +1,22 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { Transform } from 'class-transformer';
+import { IsNumber, IsUUID, Min } from 'class-validator';
+
+const toNumber = ({ value }: { value: unknown }) =>
+  value === '' || value == null ? value : Number(value);
+
+export class CreateYardDistanceDto {
+  @ApiProperty({ format: 'uuid' })
+  @IsUUID()
+  fromYardId!: string;
+
+  @ApiProperty({ format: 'uuid' })
+  @IsUUID()
+  toYardId!: string;
+
+  @ApiProperty({ description: 'Rail distance between the two yards in kilometres', example: 445 })
+  @Transform(toNumber)
+  @IsNumber()
+  @Min(0.01)
+  distanceKm!: number;
+}

apps/edr-freight-api/src/modules/rule-engine/dto/list-rule-engine-query.dto.ts

@@ -88,6 +88,18 @@ export class ListYardsQueryDto extends ListRuleEngineQueryDto {
   sortBy?: string;
 }
 
+export class ListYardDistancesQueryDto extends PaginationQueryDto {
+  @ApiPropertyOptional({ description: 'Return only distances touching this yard.' })
+  @IsOptional()
+  @IsUUID()
+  yardId?: string;
+
+  @ApiPropertyOptional({ enum: ['createdAt', 'distanceKm'], default: 'createdAt' })
+  @IsOptional()
+  @IsIn(['createdAt', 'distanceKm'])
+  sortBy?: string;
+}
+
 export class ListApprovalRulesQueryDto extends PaginationQueryDto {
   @ApiPropertyOptional({ description: 'Filter by approval chain (director vs standard).' })
   @IsOptional()

apps/edr-freight-api/src/modules/rule-engine/dto/update-yard-distance.dto.ts

@@ -0,0 +1,5 @@
+import { PartialType } from '@nestjs/mapped-types';
+
+import { CreateYardDistanceDto } from './create-yard-distance.dto';
+
+export class UpdateYardDistanceDto extends PartialType(CreateYardDistanceDto) {}