Clean up Chinese comments and add comprehensive English README

- Replace all Chinese comments with English equivalents in:
  - src/health_monitor.rs
  - src/lib.rs
  - tests/integration_test.rs
- Add comprehensive README.md with:
  - Project overview and features
  - Architecture diagram
  - Installation and configuration guide
  - Data format specifications
  - Health monitoring documentation
  - Troubleshooting guide

src/health_monitor.rs

@@ -115,7 +115,7 @@ impl HealthMonitor {
             .get_or_init(|| async {
                 let monitor = HealthMonitor::new();
                 
-                // 启动健康状态报告任务
+                // Start health status reporting task
                 let monitor_clone = monitor.clone();
                 tokio::spawn(async move {
                     monitor_clone.start_health_reporting().await;
@@ -192,7 +192,7 @@ impl HealthMonitor {
             self.log_service_health("WebSocket", &websocket_health);
             self.log_service_health("WAN Polling", &wan_health);
             
-            // 如果有服务不健康，发出警告
+            // Warn if any service is unhealthy
             if !websocket_health.is_healthy {
                 warn!("WebSocket service is unhealthy! Consecutive failures: {}", websocket_health.consecutive_failures);
             }
@@ -200,7 +200,7 @@ impl HealthMonitor {
                 warn!("WAN Polling service is unhealthy! Consecutive failures: {}", wan_health.consecutive_failures);
             }
             
-            // 如果连续失败次数过多，发出错误警报
+            // Alert if consecutive failures are too many
             if websocket_health.consecutive_failures > 10 {
                 error!("WebSocket service has {} consecutive failures!", websocket_health.consecutive_failures);
             }

src/lib.rs

@@ -1,6 +1,6 @@
 pub mod retry;
 pub mod health_monitor;
 
-// 重新导出常用的类型和函数
+// Re-export commonly used types and functions
 pub use retry::{RetryConfig, Retrier, retry_with_config, retry, retry_forever};
 pub use health_monitor::{HealthMonitor, ServiceType, ConnectionHealth};