feat(warehouse): assemble dashboard cockpit + server-side throughput series

- WarehouseDashboardPage now composes the ops KPI strip, lifecycle cards, flow
  charts, zone-occupancy heatmap and demurrage/accrual exceptions into one
  control-tower view; drop the redundant lifecycle donut.
- New GET /warehouse-inventory/throughput (date_trunc time series) replaces the
  client-side buildTrend that downloaded the entire inventory list to bucket it.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/edr-freight-web/backoffice/src/services/warehouse.service.ts

@@ -6,6 +6,7 @@ import { URL_CONSTANTS } from '@/constants/URLS';
 import type {
   ZoneOccupancy,
   WarehouseOpsStats,
+  WarehouseThroughputPoint,
   AccrualDashboardRow,
   AllocationCriteria,
   AllocationPreviewResult,
@@ -394,6 +395,10 @@ export const warehouseService = {
     ),
   opsStats: () =>
     apiClient.get<WarehouseOpsStats>(URL_CONSTANTS.WAREHOUSE_INVENTORY.OPS_STATS),
+  throughput: (granularity: 'week' | 'month' | 'year') =>
+    apiClient.get<WarehouseThroughputPoint[]>(
+      URL_CONSTANTS.WAREHOUSE_INVENTORY.THROUGHPUT(granularity),
+    ),
   autoUnloadArrived: () =>
     apiClient.post<AutoUnloadResult>(URL_CONSTANTS.WAREHOUSE_INVENTORY.AUTO_UNLOAD_ARRIVED),
   autoLoadReady: () =>