Add booking window management and locomotive scheduling features

- 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.

apps/edr-freight-api/src/modules/train-scheduling/booking-window.config.ts

@@ -0,0 +1,30 @@
+/**
+ * Booking-window timings sourced from the train_scheduling_global_rules singleton,
+ * with hardcoded fallbacks when the row is missing (see TrainSchedulingService.getWindowConfig).
+ */
+export interface BookingWindowConfig {
+  /** Days before departure the single import booking-window day falls on. */
+  importWindowLeadDays: number;
+  /** Hours before departure an export booking becomes acceptable (FCFS). */
+  exportBookingLeadHours: number;
+  /** Local (Africa/Addis_Ababa) hour at which the import window opens. */
+  windowOpenHour: number;
+  windowDurationHours: number;
+  /** Max staff document-review time after the window closes. */
+  docReviewMinutes: number;
+  paymentWindowMinutes: number;
+  /** Delay after window close before reopening when the train is not full. */
+  reopenDelayMinutes: number;
+}
+
+/** Window phase lifecycle for the one-booking-day import cycle. NULL on legacy/DOMESTIC schedules. */
+export const WINDOW_PHASES = [
+  'PRE_WINDOW',
+  'OPEN',
+  'DOC_REVIEW',
+  'PAYMENT',
+  'CLOSED_FOR_DAY',
+  'DONE',
+] as const;
+
+export type WindowPhase = (typeof WINDOW_PHASES)[number];