fix: Upgrade error handling to errors/v2 package and refactor error messages.

- Refactor error handling using `errors/v2` package for improved error management and formatting
- Implement changes in relay/controller/text.go, controller/channel-test.go, controller/relay.go, common/message/email.go, relay/controller/audio.go, controller/channel-billing.go, relay/controller/helper.go, relay/channel/common.go, relay/channel/minimax/main.go, and common/message/main.go
- Add package imports and update package paths for better code organization
- Replace hardcoded strings with error variables for consistency and readability
- Implement secure methods for generating unique Message-ID
- Improve SMTP handling and authentication in email.go
- Update response handling and error messages for better user experience
- Add constant checks and modify functions based on imageRequest parameters in helper.go
- Use `http.NewRequest` instead of `fmt.Fprint` for improved request handling in relay/channel/common.go
- Update error handling and formatting for better consistency across all files

controller/channel-billing.go

@@ -101,7 +101,7 @@ func GetResponseBody(method, url string, channel *model.Channel, headers http.He
 		return nil, err
 	}
 	if res.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("status code: %d", res.StatusCode)
+		return nil, errors.Errorf("status code: %d", res.StatusCode)
 	}
 	body, err := io.ReadAll(res.Body)
 	if err != nil {
@@ -166,7 +166,7 @@ func updateChannelAIProxyBalance(channel *model.Channel) (float64, error) {
 		return 0, err
 	}
 	if !response.Success {
-		return 0, fmt.Errorf("code: %d, message: %s", response.ErrorCode, response.Message)
+		return 0, errors.Errorf("code: %d, message: %s", response.ErrorCode, response.Message)
 	}
 	channel.UpdateBalance(response.Data.TotalPoints)
 	return response.Data.TotalPoints, nil