Refactor codebase, introduce relaymode package, update constants and improve consistency

- Refactor constant definitions and organization
- Clean up package level variables and functions
- Introduce new `relaymode` and `apitype` packages for constant definitions
- Refactor and simplify code in several packages including `openai`, `relay/channel/baidu`, `relay/util`, `relay/controller`, `relay/channeltype`
- Add helper functions in `relay/channeltype` package to convert channel type constants to corresponding API type constants
- Remove deprecated functions such as `ResponseText2Usage` from `relay/channel/openai/helper.go`
- Modify code in `relay/util/validation.go` and related files to use new `validator.ValidateTextRequest` function
- Rename `util` package to `relaymode` and update related imports in several packages

model/log.go

@@ -7,7 +7,6 @@ import (
 	"github.com/songquanpeng/one-api/common/config"
 	"github.com/songquanpeng/one-api/common/helper"
 	"github.com/songquanpeng/one-api/common/logger"
-
 	"gorm.io/gorm"
 )
 
@@ -51,6 +50,21 @@ func RecordLog(userId int, logType int, content string) {
 	}
 }
 
+func RecordTopupLog(userId int, content string, quota int) {
+	log := &Log{
+		UserId:    userId,
+		Username:  GetUsernameById(userId),
+		CreatedAt: helper.GetTimestamp(),
+		Type:      LogTypeTopup,
+		Content:   content,
+		Quota:     quota,
+	}
+	err := LOG_DB.Create(log).Error
+	if err != nil {
+		logger.SysError("failed to record log: " + err.Error())
+	}
+}
+
 func RecordConsumeLog(ctx context.Context, userId int, channelId int, promptTokens int, completionTokens int, modelName string, tokenName string, quota int64, content string) {
 	logger.Info(ctx, fmt.Sprintf("record consume log: userId=%d, channelId=%d, promptTokens=%d, completionTokens=%d, modelName=%s, tokenName=%s, quota=%d, content=%s", userId, channelId, promptTokens, completionTokens, modelName, tokenName, quota, content))
 	if !config.LogConsumeEnabled {