Replace the fixed 5-minute grace with a settlement check at expiry:
expire() calls the payment API's reconcile endpoint — paid intents are
kept and allocated via payment.succeeded, unverifiable results defer
expiry to the next tick, only verifiably unpaid holds expire.
- Added default capacities for container and bulk wagons.
- Updated wagonsFor method to consider weight and length for wagon calculations.
- Improved handling of overweight bookings with appropriate warnings.
- Adjusted tests to reflect changes in wagon capacity and validation logic.
- Implemented migration to release stuck assigned locomotives.
- Added schedule window phases to train schedules.
- Created booking batch offers table for partial capacity bookings.
- Developed BookingSplitService to handle partial booking offers and splits.
- Introduced BookingWindowService to manage booking window lifecycle and transitions.
- Added BookingBatchOffer entity to represent offers made during booking splits.
- Enhanced locomotive options with warnings for scheduling.
- Created UpcomingWindowsSection component to display upcoming booking windows.
