feat: 状态码复写

middleware/distributor.go

@@ -177,6 +177,7 @@ func SetupContextForSelectedChannel(c *gin.Context, channel *model.Channel, mode
 	}
 	c.Set("auto_ban", ban)
 	c.Set("model_mapping", channel.GetModelMapping())
+	c.Set("status_code_mapping", channel.GetStatusCodeMapping())
 	c.Request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", channel.Key))
 	c.Set("base_url", channel.GetBaseURL())
 	// TODO: api_version统一