fix: whisper model billing

- Refactor model name handling across multiple controllers to improve clarity and maintainability.
- Enhance error logging and handling for better debugging and request processing robustness.
- Update pricing models in accordance with new calculations, ensuring accuracy in the billing logic.

relay/adaptor/proxy/adaptor.go

@@ -60,7 +60,6 @@ func (a *Adaptor) GetChannelName() string {
 func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
 	prefix := fmt.Sprintf("/v1/oneapi/proxy/%d", meta.ChannelId)
 	return meta.BaseURL + strings.TrimPrefix(meta.RequestURLPath, prefix), nil
-
 }
 
 func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Request, meta *meta.Meta) error {