fix: 수주관리 Quote eager loading 필드명 수정

- OrderService.php: quote_no → quote_number 수정

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

app/Services/OrderService.php

@@ -110,7 +110,7 @@ public function show(int $id)
             ->with([
                 'client:id,name,business_no,representative,phone,email',
                 'items' => fn ($q) => $q->orderBy('sort_order'),
-                'quote:id,quote_no,site_name',
+                'quote:id,quote_number,site_name',
             ])
             ->find($id);