Add Batch Aggregate Integration to WorkshopCoordinator

[jhw-db]

Summary

Integrate batch aggregate for WorkshopCoordinator transport operations to complete batch aggregate integration across all coordinators and prepare for future rake management.

Problem

WorkshopCoordinator currently uses manual coupling/decoupling time calculations without batch aggregate integration, making it inconsistent with CollectionCoordinator and ParkingCoordinator.

Solution

Implement batch aggregate integration for both inbound (Retrofit → Workshop) and outbound (Workshop → Retrofitted) transport with MVP coupling strategy.

Implementation Details

MVP Coupling Strategy (Approach C - Pre-Dissolved)

• Retrofit Track: Wagons treated as decoupled (MVP simplification)
• Before Transport: Couple wagons into rake: (n-1) × coupling_time
• Transport: Batch aggregate for validation and tracking
• Workshop: Manual coupling/decoupling for bay operations

Changes

1. Retrofit Track Coupling: Add coupling time before transport to workshop
2. Inbound Batch Aggregate: Create with SCREW couplers
3. Outbound Batch Aggregate: Create with DAC couplers (after retrofit)
4. New Methods:
   • _transport_to_workshop_with_batch()
   • _transport_from_workshop_with_batch()
5. Fallback: Old methods if batch aggregate creation fails