Fix Contracts upload buffer endpoint

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

deploy/nginx-contracts.conf

@@ -92,22 +92,6 @@ server {
         client_max_body_size 100m;
     }
 
-    # ── VM-буфер загрузки contracts (паттерн drhider) ──────────────
-    # Браузер кладёт файл сюда PUT (мимо шлюза кластера ~64КБ), бэк тянет сам.
-    # Файлы: /var/www/contracts-upload/ (нужно создать, chown www-data).
-    # CORS: origin фронтенда = contractor.pythonk8s.dev.nubes.ru (ingress, подтверждено).
-    location /contracts-upload/ {
-        alias /var/www/contracts-upload/;
-        dav_methods PUT DELETE;
-        create_full_put_path on;
-        client_max_body_size 1024m;
-        add_header Access-Control-Allow-Origin https://contractor.pythonk8s.dev.nubes.ru always;
-        add_header Access-Control-Allow-Methods 'PUT, GET, OPTIONS, DELETE' always;
-        add_header Access-Control-Allow-Headers 'Content-Type' always;
-        add_header Access-Control-Max-Age 86400 always;
-        if ($request_method = OPTIONS) { return 204; }
-    }
-
     listen 443 ssl; # managed by Certbot
     ssl_certificate /etc/letsencrypt/live/contracts.kube5s.ru/fullchain.pem; # managed by Certbot
     ssl_certificate_key /etc/letsencrypt/live/contracts.kube5s.ru/privkey.pem; # managed by Certbot