fix exceptions

cpp/server.cpp

@@ -583,6 +583,11 @@ void do_session(
         http::write(socket, res);
         beast::error_code ec;
         socket.shutdown(boost::asio::ip::tcp::socket::shutdown_send, ec);
+    } catch (const beast::system_error &e) {
+        // Suppress "end of stream" — these are TCP-level health probes (e.g. HuggingFace Spaces)
+        // that connect and disconnect without sending an HTTP request; not a real error.
+        if (e.code() != http::error::end_of_stream)
+            log_line("session_exception=" + std::string(e.what()));
     } catch (const std::exception &e) {
         log_line("session_exception=" + std::string(e.what()));
     } catch (...) {