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-api/src/modules/warehouses/warehouse-inventory.controller.ts

@@ -81,6 +81,20 @@ export class WarehouseInventoryController {
     return this.inventoryService.throughput(g);
   }
 
+  @Get('dwell-stats')
+  @BookingStaff(FREIGHT_PERMS.warehouseInventory.view)
+  @ApiOperation({ summary: 'Dwell time of in-warehouse items: average + aging buckets' })
+  dwellStats() {
+    return this.inventoryService.dwellStats();
+  }
+
+  @Get('cycle-stats')
+  @BookingStaff(FREIGHT_PERMS.warehouseInventory.view)
+  @ApiOperation({ summary: 'Average stage cycle times over recently dispatched items' })
+  cycleStats() {
+    return this.inventoryService.cycleStats();
+  }
+
   @Post('auto-unload-arrived')
   @BookingStaff(FREIGHT_PERMS.warehouseInventory.unload)
   @ApiOperation({ summary: 'Bulk auto-unload all arrived bookings into the warehouse' })