feat(freight): basics of train scheduling

apps/edr-freight-api/src/modules/train-scheduling/dto/create-container-train-schedule.dto.ts

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+import { ApiProperty } from '@nestjs/swagger';
+import { IsUUID } from 'class-validator';
+
+import { PreviewContainerTrainScheduleDto } from './preview-container-train-schedule.dto';
+
+export class CreateContainerTrainScheduleDto extends PreviewContainerTrainScheduleDto {
+  @ApiProperty({ format: 'uuid' })
+  @IsUUID()
+  locomotiveId!: string;
+}

apps/edr-freight-api/src/modules/train-scheduling/dto/get-eligible-container-bookings.dto.ts

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+import { ApiPropertyOptional } from '@nestjs/swagger';
+import { IsDateString, IsOptional, IsUUID } from 'class-validator';
+
+export class GetEligibleContainerBookingsDto {
+  @ApiPropertyOptional({ format: 'uuid' })
+  @IsOptional()
+  @IsUUID()
+  originStationId?: string;
+
+  @ApiPropertyOptional({ format: 'uuid' })
+  @IsOptional()
+  @IsUUID()
+  destinationStationId?: string;
+
+  @ApiPropertyOptional({ example: '2026-06-20T08:00:00.000Z' })
+  @IsOptional()
+  @IsDateString()
+  scheduleDate?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  status?: string;
+}

apps/edr-freight-api/src/modules/train-scheduling/dto/preview-container-train-schedule.dto.ts

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+import { ApiProperty } from '@nestjs/swagger';
+import { ArrayMinSize, IsArray, IsDateString, IsUUID } from 'class-validator';
+
+export class PreviewContainerTrainScheduleDto {
+  @ApiProperty({ type: [String] })
+  @IsArray()
+  @ArrayMinSize(1)
+  @IsUUID('4', { each: true })
+  bookingIds!: string[];
+
+  @ApiProperty({ example: '2026-06-20T08:00:00.000Z' })
+  @IsDateString()
+  scheduleDate!: string;
+
+  @ApiProperty({ format: 'uuid' })
+  @IsUUID()
+  originStationId!: string;
+
+  @ApiProperty({ format: 'uuid' })
+  @IsUUID()
+  destinationStationId!: string;
+}