chore: fix logging error in mcp stdio (#1322)

mcp-server/src/logger.js

@@ -78,7 +78,7 @@ function log(level, ...args) {
 		// is responsible for directing logs correctly (e.g., to stderr)
 		// during tool execution without upsetting the client connection.
 		// Logs outside of tool execution (like startup) will go to stdout.
-		console.log(prefix, ...coloredArgs);
+		console.error(prefix, ...coloredArgs);
 	}
 }