chore(config): remove unused redis and s3 client constructors

Remove `NewRedis` and `NewS3` factory functions from the config package
to eliminate unused initialization logic and reduce dependency bloat.

internal/config/storage.go

@@ -1,14 +1,5 @@
 package config
 
-import (
-	"context"
-	"fmt"
-	"time"
-
-	"github.com/minio/minio-go/v7"
-	"github.com/minio/minio-go/v7/pkg/credentials"
-)
-
 // S3Config S3 存储配置
 type S3Config struct {
 	Endpoint  string `mapstructure:"endpoint"`
@@ -19,30 +10,3 @@ type S3Config struct {
 	Region    string `mapstructure:"region"`
 	Domain    string `mapstructure:"domain"` // 自定义域名，如 s3.carrot.skin
 }
-
-// NewS3 创建 S3 客户端
-func NewS3(cfg *S3Config) (*minio.Client, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
-	defer cancel()
-
-	client, err := minio.New(cfg.Endpoint, &minio.Options{
-		Creds:  credentials.NewStaticV4(cfg.AccessKey, cfg.SecretKey, ""),
-		Secure: cfg.UseSSL,
-	})
-	if err != nil {
-		return nil, fmt.Errorf("failed to create S3 client: %w", err)
-	}
-
-	exists, err := client.BucketExists(ctx, cfg.Bucket)
-	if err != nil {
-		// Access Denied 或网络不通时，跳过 bucket 检查，假定 bucket 已存在
-	} else if !exists {
-		if err := client.MakeBucket(ctx, cfg.Bucket, minio.MakeBucketOptions{
-			Region: cfg.Region,
-		}); err != nil {
-			return nil, fmt.Errorf("failed to create bucket: %w", err)
-		}
-	}
-
-	return client, nil
-}