feat: supprt channel priority now & record channel id in log (#484)

* feat: 支持设置渠道优先级 & 日志中显示使用的渠道ID

* fix: 设置渠道优先级未更新 ability

* chore: update implementation

---------

Co-authored-by: Xiangyuan Liu <xiangyuan.liu@ui.com>
Co-authored-by: JustSong <songquanpeng@foxmail.com>
Co-authored-by: JustSong <39998050+songquanpeng@users.noreply.github.com>

model/channel.go

@@ -23,6 +23,7 @@ type Channel struct {
 	Group              string  `json:"group" gorm:"type:varchar(32);default:'default'"`
 	UsedQuota          int64   `json:"used_quota" gorm:"bigint;default:0"`
 	ModelMapping       string  `json:"model_mapping" gorm:"type:varchar(1024);default:''"`
+	Priority           int64   `json:"priority" gorm:"bigint;default:0"`
 }
 
 func GetAllChannels(startIdx int, num int, selectAll bool) ([]*Channel, error) {