feat: 添加环境变量管理工具和部署配置改版

主要改动：
- 新增交互式环境配置脚本 (scripts/setup-env.sh)
- 新增本地启动快捷脚本 (scripts/run-local.sh)
- 新增环境变量模板文件 (.env.example)
- 部署模式改版：使用嵌入式配置 + 环境变量覆盖
- 添加对象存储功能支持
- 改进 IoT 卡片导入任务
- 优化 OpenAPI 文档生成
- 删除旧的配置文件，改用嵌入式默认配置

pkg/storage/service.go

@@ -0,0 +1,112 @@
+package storage
+
+import (
+	"context"
+	"fmt"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+
+	"github.com/break/junhong_cmp_fiber/pkg/config"
+)
+
+type Service struct {
+	provider Provider
+	config   *config.StorageConfig
+}
+
+func NewService(provider Provider, cfg *config.StorageConfig) *Service {
+	return &Service{
+		provider: provider,
+		config:   cfg,
+	}
+}
+
+func (s *Service) GenerateFileKey(purpose, fileName string) (string, error) {
+	mapping, ok := PurposeMappings[purpose]
+	if !ok {
+		return "", fmt.Errorf("不支持的文件用途: %s", purpose)
+	}
+
+	ext := filepath.Ext(fileName)
+	if ext == "" {
+		ext = ".bin"
+	}
+
+	now := time.Now()
+	id := uuid.New().String()
+
+	key := fmt.Sprintf("%s/%04d/%02d/%02d/%s%s",
+		mapping.Prefix,
+		now.Year(),
+		now.Month(),
+		now.Day(),
+		id,
+		strings.ToLower(ext),
+	)
+
+	return key, nil
+}
+
+func (s *Service) GetUploadURL(ctx context.Context, purpose, fileName, contentType string) (*PresignResult, error) {
+	fileKey, err := s.GenerateFileKey(purpose, fileName)
+	if err != nil {
+		return nil, err
+	}
+
+	if contentType == "" {
+		if mapping, ok := PurposeMappings[purpose]; ok && mapping.ContentType != "" {
+			contentType = mapping.ContentType
+		} else {
+			contentType = "application/octet-stream"
+		}
+	}
+
+	expires := s.config.Presign.UploadExpires
+	if expires == 0 {
+		expires = 15 * time.Minute
+	}
+
+	url, err := s.provider.GetUploadURL(ctx, fileKey, contentType, expires)
+	if err != nil {
+		return nil, err
+	}
+
+	return &PresignResult{
+		URL:       url,
+		FileKey:   fileKey,
+		ExpiresIn: int(expires.Seconds()),
+	}, nil
+}
+
+func (s *Service) GetDownloadURL(ctx context.Context, fileKey string) (*PresignResult, error) {
+	expires := s.config.Presign.DownloadExpires
+	if expires == 0 {
+		expires = 24 * time.Hour
+	}
+
+	url, err := s.provider.GetDownloadURL(ctx, fileKey, expires)
+	if err != nil {
+		return nil, err
+	}
+
+	return &PresignResult{
+		URL:       url,
+		FileKey:   fileKey,
+		ExpiresIn: int(expires.Seconds()),
+	}, nil
+}
+
+func (s *Service) DownloadToTemp(ctx context.Context, fileKey string) (string, func(), error) {
+	return s.provider.DownloadToTemp(ctx, fileKey)
+}
+
+func (s *Service) Provider() Provider {
+	return s.provider
+}
+
+func (s *Service) Bucket() string {
+	return s.config.S3.Bucket
+}