refactor(cache): 抽离 Redis 缓存初始化逻辑

- 新增 utility/cache.go 文件，定义全局的 RedisCache 变量
- 修改 hero.go 中的缓存使用方式，使用新的 RedisCache 全局变量
- 更新 main.go，移除冗余的包引用

internal/logic/hero/hero.go

@@ -6,9 +6,9 @@ import (
 	"epic/internal/dao"
 	"epic/internal/model/entity"
 	"epic/internal/service"
+	"epic/utility"
 	"fmt"
 	"github.com/gogf/gf/v2/frame/g"
-	"github.com/gogf/gf/v2/os/gcache"
 	"time"
 )
 
@@ -39,16 +39,10 @@ func (l *Logic) GetHeroByCode(ctx context.Context, code string) (*entity.EpicHer
 
 // GetHeroList 查询所有英雄信息，并按创建时间倒序排列
 func (l *Logic) GetHeroList(ctx context.Context) ([]*v1.EpicHeroVO, error) {
-	// 推荐从配置文件加载
-	redisClient := g.Redis()
-	cache := gcache.New()
-	cache.SetAdapter(gcache.NewAdapterRedis(redisClient))
-	// Create redis cache adapter and set it to cache object.
 
-	//fmt.Println(cache.MustGet(ctx, "epic_artifact_map_key").String())
-	cache.Set(ctx, "epic_artifact_map_key111", "545487878", 1000*time.Second)
-	cache.Set(ctx, "epic_artifact_map_key222", "5454878787878878", 0)
-	fmt.Println(cache.Get(ctx, "epic_artifact_map_key111"))
+	utility.RedisCache.Set(ctx, "epic_artifact_map_key111", "122", 1000*time.Second)
+	utility.RedisCache.Set(ctx, "epic_artifact_map_key222", "6565", 0)
+	fmt.Println(utility.RedisCache.Get(ctx, "NAME"))
 
 	var (
 		doList []*entity.EpicHeroInfo // 数据库原始结构