feat: support OpenAI channel type in sora relay adaptor

relay/relay_adaptor.go

@@ -139,7 +139,7 @@ func GetTaskAdaptor(platform constant.TaskPlatform) channel.TaskAdaptor {
 			return &taskVidu.TaskAdaptor{}
 		case constant.ChannelTypeDoubaoVideo:
 			return &taskdoubao.TaskAdaptor{}
-		case constant.ChannelTypeSora:
+		case constant.ChannelTypeSora, constant.ChannelTypeOpenAI:
 			return &tasksora.TaskAdaptor{}
 		}
 	}