fix: Refactor: Ignore nil adaptors when initializing OpenAI models map

- Ignore nil adaptors when initializing OpenAI models map

controller/model.go

@@ -59,6 +59,10 @@ func init() {
 	// https://platform.openai.com/docs/models/model-endpoint-compatibility
 	for i := 0; i < constant.APITypeDummy; i++ {
 		adaptor := helper.GetAdaptor(i)
+		if adaptor == nil {
+			continue
+		}
+
 		channelName := adaptor.GetChannelName()
 		modelNames := adaptor.GetModelList()
 		for _, modelName := range modelNames {