支持 S3 兼容对象存储 (#336)

* feat(storage): 支持 S3 对象存储

* fix(storage): 补齐 S3 对象文件后缀

backend/internal/database/schema.go

@@ -43,6 +43,7 @@ func Models() []any {
 		&model.UserPluginState{},
 		&model.ArkPrivateAssetBinding{},
 		&model.UserOSSSetting{},
+		&model.StorageLocation{},
 		&model.UserDailyUploadUsage{},
 		&model.Skill{},
 		&model.UserSkillState{},