feat: 添加微服务模板基础架构

- 创建基于 CloudWego Hertz 的 Go 微服务脚手架
- 集成 Nacos 服务注册/发现功能
- 添加 gRPC 客户端支持
- 实现环境变量配置管理 (.env.example)
- 添加 HTTP 中间件 (Recovery, AccessLog, CORS)
- 配置 Gitea CI/CD 构建部署流程

BREAKING CHANGE: 项目结构调整，从简单的 API 服务升级为完整的微服务架构

utils/httplog/request.go

@@ -0,0 +1,132 @@
+package httplog
+
+import (
+	"encoding/json"
+	"mime"
+	"strings"
+
+	"github.com/cloudwego/hertz/pkg/app"
+)
+
+var sensitiveKeys = []string{"password", "secret", "token", "key", "passwd"}
+
+const redactedValue = "[REDACTED]"
+
+// desensitization：只对第一层 key 做脱敏，不递归
+func desensitization(data map[string]any) ([]byte, error) {
+	out := make(map[string]any, len(data))
+
+	for k, v := range data {
+		if isSensitiveKey(k) {
+			out[k] = redactedValue
+		} else {
+			out[k] = v
+		}
+	}
+	return json.Marshal(out)
+}
+
+// 大小写不敏感、包含式匹配
+func isSensitiveKey(key string) bool {
+	k := strings.ToLower(key)
+	for _, s := range sensitiveKeys {
+		if strings.Contains(k, s) {
+			return true
+		}
+	}
+	return false
+}
+
+// FormBodyToJSONWithFilePlaceholder ：
+// - 普通表单：完整转 JSON
+// - multipart 文件字段：不取任何文件信息，只输出 "[file]" 或 ["[file]", ...]
+func FormBodyToJSONWithFilePlaceholder(c *app.RequestContext) (jsonBytes []byte, ok bool, err error) {
+	ct := string(c.Request.Header.ContentType())
+	mediaType, _, _ := mime.ParseMediaType(ct)
+	mediaType = strings.ToLower(mediaType)
+
+	out := make(map[string]any)
+
+	switch mediaType {
+	case "application/x-www-form-urlencoded":
+		args := c.PostArgs()
+		args.VisitAll(func(k, v []byte) {
+			key := string(k)
+			// 同名 key 多次出现时，转成数组
+			if old, exists := out[key]; exists {
+				switch x := old.(type) {
+				case string:
+					out[key] = []string{x, string(v)}
+				case []string:
+					out[key] = append(x, string(v))
+				default:
+					out[key] = string(v)
+				}
+			} else {
+				out[key] = string(v)
+			}
+		})
+		b, e := desensitization(out)
+		return b, true, e
+
+	case "multipart/form-data":
+		form, e := c.MultipartForm()
+		if e != nil {
+			return nil, false, e
+		}
+
+		// 普通字段
+		for k, vv := range form.Value {
+			if len(vv) == 1 {
+				out[k] = vv[0]
+			} else {
+				out[k] = vv
+			}
+		}
+
+		// 文件字段：只做占位，不读取任何文件信息
+		for k, files := range form.File {
+			if len(files) <= 1 {
+				out[k] = "[file]"
+			} else {
+				arr := make([]string, 0, len(files))
+				for range files {
+					arr = append(arr, "[file]")
+				}
+				out[k] = arr
+			}
+		}
+
+		b, e2 := desensitization(out)
+		return b, true, e2
+
+	default:
+		// 不是表单就不处理
+		return nil, false, nil
+	}
+}
+
+// ResponseBodySnippet ：获取响应内容
+func ResponseBodySnippet(c *app.RequestContext, maxBytes int) (body string, ok bool, truncated bool) {
+	b := c.Response.Body()
+	if len(b) == 0 {
+		return "", false, false
+	}
+
+	// 只采集“看起来像文本/JSON”的响应，其他（图片/zip等）直接跳过
+	ct := strings.ToLower(string(c.Response.Header.ContentType()))
+	if ct != "" && !(strings.HasPrefix(ct, "text/") ||
+		strings.Contains(ct, "application/json") ||
+		strings.Contains(ct, "application/xml") ||
+		strings.Contains(ct, "application/javascript")) {
+		return "", false, false
+	}
+
+	if maxBytes > 0 && len(b) > maxBytes {
+		b = b[:maxBytes]
+		truncated = true
+	}
+
+	body = string(b)
+	return body, true, truncated
+}