feat: Add real-time warehouse statistics with daily changes for fulfillment centers

- Added new GraphQL query `GET_FULFILLMENT_WAREHOUSE_STATS` to fetch warehouse statistics with daily changes
- Created comprehensive GraphQL resolver `fulfillmentWarehouseStats` that calculates:
  * Current quantities for products, goods, defects, pvzReturns, fulfillmentSupplies, sellerSupplies
  * Daily changes (absolute numbers) based on deliveries in the last 24 hours
  * Percentage changes for all categories
- Updated fulfillment warehouse dashboard to use real GraphQL data instead of static calculations
- Added polling every 60 seconds to keep statistics up-to-date
- Enhanced StatCard component to display accurate percentage and absolute changes
- Statistics now show real supply deliveries and changes relative to the previous day

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/graphql/typedefs.ts

@@ -1276,4 +1276,24 @@ export const typeDefs = gql`
       input: WBWarehouseCacheInput!
     ): WBWarehouseCacheResponse!
   }
+
+  # Типы для статистики склада фулфилмента
+  type FulfillmentWarehouseStats {
+    products: WarehouseStatsItem!
+    goods: WarehouseStatsItem!
+    defects: WarehouseStatsItem!
+    pvzReturns: WarehouseStatsItem!
+    fulfillmentSupplies: WarehouseStatsItem!
+    sellerSupplies: WarehouseStatsItem!
+  }
+
+  type WarehouseStatsItem {
+    current: Int!
+    change: Int!
+    percentChange: Float!
+  }
+
+  extend type Query {
+    fulfillmentWarehouseStats: FulfillmentWarehouseStats!
+  }
 `;