fix(relay): 请求参数校验错误返回 HTTP 400 (#6774)

* fix(relay): return 400 for invalid request parameters

controller/relay.go

@@ -117,7 +117,7 @@ func Relay(c *gin.Context, relayFormat types.RelayFormat) {
 		if common.IsRequestBodyTooLargeError(err) || errors.Is(err, common.ErrRequestBodyTooLarge) {
 			newAPIError = types.NewErrorWithStatusCode(err, types.ErrorCodeReadRequestBodyFailed, http.StatusRequestEntityTooLarge, types.ErrOptionWithSkipRetry())
 		} else {
-			newAPIError = types.NewError(err, types.ErrorCodeInvalidRequest)
+			newAPIError = types.NewError(err, types.ErrorCodeInvalidRequest, types.ErrOptionWithStatusCode(http.StatusBadRequest), types.ErrOptionWithSkipRetry())
 		}
 		return
 	}