feat(warehouse): P1 dashboard analytics — dwell/aging, cycle-time + on-time, live deltas

Adds the operational-performance layer to the warehouse cockpit:

- Dwell time & aging: dwellStats() (avg + 0-3/4-7/8-14/15+ buckets over
  in-warehouse items) → DwellAgingCard histogram.
- Cycle time & on-time: cycleStats() (arrived→ready→loaded→dispatched stage
  averages + dock-to-dispatch) and onTimeDispatchStats() (share of items that
  left before their storage free-days expired, resolved via the fee engine's
  own rule matching) → CycleTimeCard.
- Live tiles: opsStats() now returns receivedYesterday; KpiStrip renders an
  optional ▲/▼ delta, and the ops strip shows received-today vs yesterday.

New endpoints: GET /warehouse-inventory/{dwell-stats,cycle-stats} and
/warehouse-fees/on-time-dispatch (all guarded). New "Performance" section on
WarehouseDashboardPage. On-time reads N/A when there is no sample / no active
storage rule.

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

apps/edr-freight-web/backoffice/src/hooks/useWarehouses.ts

@@ -160,6 +160,30 @@ export function useWarehouseThroughput(granularity: 'week' | 'month' | 'year') {
   });
 }
 
+/** Dwell time of in-warehouse items (average + aging buckets). */
+export function useWarehouseDwellStats() {
+  return useQuery({
+    queryKey: ['warehouse-inventory', 'dwell-stats'],
+    queryFn: () => warehouseService.dwellStats().then((r) => r.data),
+  });
+}
+
+/** Average stage cycle times over recently dispatched items. */
+export function useWarehouseCycleStats() {
+  return useQuery({
+    queryKey: ['warehouse-inventory', 'cycle-stats'],
+    queryFn: () => warehouseService.cycleStats().then((r) => r.data),
+  });
+}
+
+/** On-time dispatch rate (left before storage free-days expired). */
+export function useOnTimeDispatch() {
+  return useQuery({
+    queryKey: ['warehouse-fees', 'on-time-dispatch'],
+    queryFn: () => warehouseService.onTimeDispatch().then((r) => r.data),
+  });
+}
+
 /** Live per-item fee accrual (storage/demurrage) with alerts. */
 export function useAccrualDashboard(billingCurrency?: 'ETB' | 'USD') {
   return useQuery({