refactor: 移除 FeignConfig 类

删除了 FeignConfig 类及相关配置，包括日志级别设置、请求拦截器、错误解码器等。这部分配置可能已经不再需要，或者已经被其他配置所替代。

src/main/java/com/ycwl/basic/config/FeignConfig.java

@@ -1,63 +0,0 @@
-package com.ycwl.basic.config;
-
-import feign.Logger;
-import feign.RequestInterceptor;
-import feign.codec.ErrorDecoder;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.web.context.request.RequestContextHolder;
-import org.springframework.web.context.request.ServletRequestAttributes;
-
-import jakarta.servlet.http.HttpServletRequest;
-
-@Slf4j
-@Configuration
-public class FeignConfig {
-
-    @Bean
-    public Logger.Level feignLoggerLevel() {
-        return Logger.Level.BASIC;
-    }
-
-    @Bean
-    public RequestInterceptor requestInterceptor() {
-        return requestTemplate -> {
-            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
-            if (attributes != null) {
-                HttpServletRequest request = attributes.getRequest();
-                
-                // 传递认证头
-                String authorization = request.getHeader("Authorization");
-                if (authorization != null) {
-                    requestTemplate.header("Authorization", authorization);
-                }
-            }
-        };
-    }
-
-    @Bean
-    public ErrorDecoder errorDecoder() {
-        return new FeignErrorDecoder();
-    }
-
-    public static class FeignErrorDecoder implements ErrorDecoder {
-        private final ErrorDecoder defaultErrorDecoder = new Default();
-
-        @Override
-        public Exception decode(String methodKey, feign.Response response) {
-            log.error("Feign调用失败: method={}, status={}, reason={}", 
-                methodKey, response.status(), response.reason());
-            
-            if (response.status() >= 400 && response.status() < 500) {
-                // 4xx错误，客户端错误
-                return new RuntimeException("客户端请求错误: " + response.reason());
-            } else if (response.status() >= 500) {
-                // 5xx错误，服务器错误
-                return new RuntimeException("服务器内部错误: " + response.reason());
-            }
-            
-            return defaultErrorDecoder.decode(methodKey, response);
-        }
-    }
-}