refactor(relay): move replay metadata onto request bodies

relay/embedding_handler.go

@@ -58,14 +58,12 @@ func EmbeddingHelper(c *gin.Context, info *relaycommon.RelayInfo) (newAPIError *
 	}
 
 	logger.LogDebug(c, "converted embedding request body: %s", jsonData)
-	body, size, getBody, closer, err := relaycommon.NewOutboundJSONBody(jsonData)
+	body, closer, err := relaycommon.NewOutboundJSONBody(jsonData)
 	if err != nil {
 		return types.NewError(err, types.ErrorCodeConvertRequestFailed, types.ErrOptionWithSkipRetry())
 	}
 	defer closer.Close()
 	jsonData = nil
-	info.UpstreamRequestBodySize = size
-	info.UpstreamRequestGetBody = getBody
 	var requestBody io.Reader = body
 	statusCodeMappingStr := c.GetString("status_code_mapping")
 	resp, err := adaptor.DoRequest(c, info, requestBody)