feat(deploy): 隔离上传目录 uploads_prod，清理部署脚本无效排除项

deploy.sh

@@ -37,7 +37,6 @@ tar -czf deploy.tar.gz \
     --exclude="backend/__pycache__" \
     --exclude="backend/*.pyc" \
     --exclude="backend/.env" \
-    --exclude="backend/uploads" \
     --exclude="frontend/node_modules" \
     --exclude="frontend/dist" \
     --exclude=".git" \