feat(main): 添加CAN 1Hz反馈轮询任务和HTTP接口

- 新增monitor/can_feedback_task.cpp组件，实现CAN 1Hz反馈轮询功能
- 在main.cpp中注册CAN反馈轮询任务，依赖SPI初始化完成后启动
- 在OTA协调器和中继模块中集成CAN反馈任务暂停/恢复机制
- 扩展CANFD桥接层，添加0xC1反馈查询、0xC2模式切换、0xC3ID快照协议支持
- 新增HTTP接口/can/feedback提供三路CAN反馈快照数据
- 新增HTTP接口/can/mode支持查询和切换CAN接收过滤模式
- 更新版本号从0.3.34到0.35
- 扩大SPI缓冲区以支持更大帧传输需求

BREAKING CHANGE: 新增CAN反馈监控功能需要GD32固件支持0xC1/0xC2/0xC3协议扩展

main/server/wifi_ota.cpp

@@ -456,6 +456,9 @@ esp_err_t WifiOta::httpServerStart()
         {"/system/status", HTTP_GET,  system_status_handler},
         {"/system/probe",  HTTP_GET,  system_probe_handler},
         {"/can/send",      HTTP_POST, can_send_handler},
+        {"/can/feedback",  HTTP_GET,  can_feedback_handler},
+        {"/can/mode",      HTTP_GET,  can_mode_handler},
+        {"/can/mode",      HTTP_POST, can_mode_handler},
         {"/spi/send",      HTTP_POST, spi_send_handler},
     };
 
@@ -475,7 +478,7 @@ esp_err_t WifiOta::httpServerStart()
         httpd_register_uri_handler(WifiOta::instance().m_httpServer, &opts_uri);
     }
 
-    DEBUG_INFO("WIFI", "注册端点: /ota/upload, /ota/relay, /ota/update, /restart, /logs, /system/status, /system/probe, /can/send, /spi/send");
+    DEBUG_INFO("WIFI", "注册端点: /ota/upload, /ota/relay, /ota/update, /restart, /logs, /system/status, /system/probe, /can/send, /spi/send, /can/feedback, /can/mode");
 
     return ESP_OK;
 }