refactor: remove gate pass granting logic from clearance services and UI

- Removed the gate pass granting functionality from the BookingClearanceService and ContractClearanceService, replacing it with a new method to retrieve gate pass status from train schedules.
- Updated the ContractsController to eliminate endpoints related to gate pass granting.
- Refactored the UI components (ExportClearanceStepper and PhasedClearanceActionPanel) to reflect the new gate pass securing process, linking to the train scheduling interface instead.
- Cleaned up related constants and query hooks, removing unused code and references to the gate pass functionality.
- Adjusted types in the contracts to accommodate changes in the gate pass handling logic.

apps/edr-freight-api/src/modules/contracts/contract-clearance.service.ts

@@ -278,7 +278,9 @@ export class ContractClearanceService {
     }
     const bookingMilestone = (code: string) =>
       bookingMilestones.find((m) => m.milestoneCode === code);
-    const gatepassMilestone = bookingMilestone('GATEPASS_GRANTED');
+    const gatepass = cycle?.bookingId
+      ? await this.glOperationsService.gatepassForBooking(cycle.bookingId)
+      : { granted: false, grantedAt: null };
     const t1ClosedMilestone = bookingMilestone('T1_CLOSED');
     const riskMilestone = bookingMilestone('RISK_ASSIGNED');
     const secondDuty = this.glOperationsService.secondDutyState(
@@ -344,14 +346,8 @@ export class ContractClearanceService {
       workflowFiles,
       t1,
       train,
-      gatepassGranted: gatepassMilestone?.status === 'COMPLETED',
-      gatepassAt:
-        gatepassMilestone?.status === 'COMPLETED'
-          ? (gatepassMilestone.metadata?.gatepassAt ??
-            (gatepassMilestone.triggeredAt
-              ? gatepassMilestone.triggeredAt.toISOString()
-              : null))
-          : null,
+      gatepassGranted: gatepass.granted,
+      gatepassAt: gatepass.grantedAt,
       t1Closed: t1ClosedMilestone?.status === 'COMPLETED',
       t1ClosedAt:
         t1ClosedMilestone?.status === 'COMPLETED' && t1ClosedMilestone.triggeredAt