feat: 增加重连过程的详细日志输出

- handleReconnect 中的日志从 debug 改为 info/warning
- 添加重连尝试次数和 reconnectAttempts 计数器的显示
- 添加等待时间日志
- 便于诊断重连失败的原因

Sources/Nats/NatsConnection.swift

@@ -1011,21 +1011,28 @@ class ConnectionHandler: ChannelInboundHandler {
             oldTask.cancel()
         }
         
+        logger.info("🔄 Starting reconnection process...")
+        
         reconnectTask = Task {
             var connected = false
+            var attempt = 0
             while !Task.isCancelled
                 && (maxReconnects == nil || self.reconnectAttempts < maxReconnects!)
             {
+                attempt += 1
+                logger.info("🔄 Reconnect attempt \(attempt), total reconnectAttempts: \(self.reconnectAttempts)")
                 do {
                     try await self.connect()
                     connected = true
+                    logger.info("✅ Reconnection successful after \(attempt) attempts")
                     break  // Successfully connected
                 } catch is CancellationError {
-                    logger.debug("Reconnect task cancelled")
+                    logger.info("⚠️ Reconnect task cancelled")
                     return
                 } catch {
-                    logger.debug("Could not reconnect: \(error)")
+                    logger.warning("⚠️ Reconnect attempt \(attempt) failed: \(error)")
                     if !Task.isCancelled {
+                        logger.info("⏳ Waiting \(Double(self.reconnectWait) / 1_000_000_000)s before next attempt...")
                         try? await Task.sleep(nanoseconds: self.reconnectWait)
                     }
                 }
@@ -1033,13 +1040,13 @@ class ConnectionHandler: ChannelInboundHandler {
 
             // Early return if cancelled
             if Task.isCancelled {
-                logger.debug("Reconnect task cancelled after connection attempts")
+                logger.info("⚠️ Reconnect task cancelled after \(attempt) connection attempts")
                 return
             }
 
             // If we got here without connecting and weren't cancelled, we hit max reconnects
             if !connected {
-                logger.error("Could not reconnect; maxReconnects exceeded")
+                logger.error("❌ Could not reconnect; maxReconnects exceeded (\(self.maxReconnects ?? -1))")
                 try? await self.close()
                 return
             }