修复发现注册到 nacos 上的 mcp server 时， 无法正确发现 https 协议的 mcp server 的问题

Author: Sunrisea

spring-ai-alibaba-mcp/spring-ai-alibaba-mcp-registry/src/main/java/com/alibaba/cloud/ai/mcp/discovery/client/transport/LoadbalancedMcpAsyncClient.java

@@ -355,7 +355,16 @@ private void updateAll(NacosMcpServerEndpoint newServerEndpoint) {
 	private McpAsyncClient clientByEndpoint(McpEndpointInfo mcpEndpointInfo, String exportPath) {
 		McpAsyncClient asyncClient;
 
-		String baseUrl = "http://" + mcpEndpointInfo.getAddress() + ":" + mcpEndpointInfo.getPort();
+		String protocol = mcpEndpointInfo.getProtocol();
+		if (protocol == null || !"http".equals(protocol) && !"https".equals(protocol)) {
+			if (mcpEndpointInfo.getPort() == 443) {
+				protocol = "https";
+			}
+			else {
+				protocol = "http";
+			}
+		}
+		String baseUrl = protocol + "://" + mcpEndpointInfo.getAddress() + ":" + mcpEndpointInfo.getPort();
 		WebClient.Builder webClientBuilder = webClientBuilderTemplate.clone().baseUrl(baseUrl);
 
 		WebFluxSseClientTransport transport;

spring-ai-alibaba-mcp/spring-ai-alibaba-mcp-registry/src/main/java/com/alibaba/cloud/ai/mcp/discovery/client/transport/LoadbalancedMcpSyncClient.java

@@ -294,7 +294,16 @@ public void setLoggingLevel(McpSchema.LoggingLevel loggingLevel) {
 
 	private McpSyncClient clientByEndpoint(McpEndpointInfo mcpEndpointInfo, String exportPath) {
 		McpSyncClient syncClient;
-		String baseUrl = "http://" + mcpEndpointInfo.getAddress() + ":" + mcpEndpointInfo.getPort();
+		String protocol = mcpEndpointInfo.getProtocol();
+		if (protocol == null || !"http".equals(protocol) && !"https".equals(protocol)) {
+			if (mcpEndpointInfo.getPort() == 443) {
+				protocol = "https";
+			}
+			else {
+				protocol = "http";
+			}
+		}
+		String baseUrl = protocol + "://" + mcpEndpointInfo.getAddress() + ":" + mcpEndpointInfo.getPort();
 		WebClient.Builder webClientBuilder = webClientBuilderTemplate.clone().baseUrl(baseUrl);
 
 		// Using the build method with link tracking