Implement WasteCollected push notification and fix empty collection history issue

app/Services/Scan/ScanService.php

@@ -123,6 +123,15 @@ class ScanService
                 $this->qrAllocator->notifyBalanceIfLow($code->household);
             }
 
+            // Notify the resident about the collection
+            $notifiable = $code->household?->head ?? $code->user;
+            if ($notifiable) {
+                \Illuminate\Support\Facades\Notification::send(
+                    $notifiable,
+                    new \App\Notifications\WasteCollected($log)
+                );
+            }
+
             return ScanResult::accepted($code->fresh(), $log);
         });
     }