added default suffix, added ttn to order documents

app/Http/Controllers/OrderController.php

@@ -347,6 +347,7 @@ class OrderController extends Controller
         $ttn = Ttn::query()->create([
             'year' => date('Y'),
             'ttn_number'    => Ttn::getTtnNumber() + 1,
+            'ttn_number_suffix' => 'И',
             'order_number'  => $request->order_number,
             'order_date'    => $request->order_date,
             'order_sum'     => $request->order_sum,

app/Services/GenerateDocumentsService.php

@@ -604,7 +604,7 @@ class GenerateDocumentsService
         ]);
         $ttn->file_id = $fileModel->id;
         $ttn->save();
-
+        $order->documents()->attach($fileModel->id);
         return $fileModel->link ?? '';
     }