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/bootstrap/directories.go

@@ -0,0 +1,69 @@
+package bootstrap
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/break/junhong_cmp_fiber/pkg/config"
+	"go.uber.org/zap"
+)
+
+type DirectoryResult struct {
+	TempDir      string
+	AppLogDir    string
+	AccessLogDir string
+	Fallbacks    []string
+}
+
+func EnsureDirectories(cfg *config.Config, logger *zap.Logger) (*DirectoryResult, error) {
+	result := &DirectoryResult{}
+
+	directories := []struct {
+		path      string
+		configKey string
+		resultPtr *string
+	}{
+		{cfg.Storage.TempDir, "storage.temp_dir", &result.TempDir},
+		{filepath.Dir(cfg.Logging.AppLog.Filename), "logging.app_log.filename", &result.AppLogDir},
+		{filepath.Dir(cfg.Logging.AccessLog.Filename), "logging.access_log.filename", &result.AccessLogDir},
+	}
+
+	for _, dir := range directories {
+		if dir.path == "" || dir.path == "." {
+			continue
+		}
+
+		actualPath, fallback, err := ensureDirectory(dir.path, logger)
+		if err != nil {
+			return nil, fmt.Errorf("创建目录 %s (%s) 失败: %w", dir.path, dir.configKey, err)
+		}
+
+		*dir.resultPtr = actualPath
+		if fallback {
+			result.Fallbacks = append(result.Fallbacks, actualPath)
+		}
+	}
+
+	return result, nil
+}
+
+func ensureDirectory(path string, logger *zap.Logger) (actualPath string, fallback bool, err error) {
+	if err := os.MkdirAll(path, 0755); err != nil {
+		if os.IsPermission(err) {
+			fallbackPath := filepath.Join(os.TempDir(), "junhong", filepath.Base(path))
+			if mkErr := os.MkdirAll(fallbackPath, 0755); mkErr != nil {
+				return "", false, fmt.Errorf("原路径 %s 权限不足，降级路径 %s 也创建失败: %w", path, fallbackPath, mkErr)
+			}
+			if logger != nil {
+				logger.Warn("目录权限不足，使用降级路径",
+					zap.String("original", path),
+					zap.String("fallback", fallbackPath),
+				)
+			}
+			return fallbackPath, true, nil
+		}
+		return "", false, err
+	}
+	return path, false, nil
+}