[ISSUE] Does Workspace client use route optimized endpoints

[moritzmeister]

Description
We have a bunch of route optimized model serving endpoints that we query using the go sdk.
Route optimized endpints have essentially two hosts, the regular workspace host and the host for the optimized routing.

When setting up the workspace client, we use the regular workspace host. So now we are wondering if the query method then actually uses the route optimized endpoint?

We saw that even for a route optimized endpoint it's possible to call the non-optimized host/endpoint.

Reproduction

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"os"

	"github.com/databricks/databricks-sdk-go"
	"github.com/databricks/databricks-sdk-go/service/serving"
)

func main() {
	w := databricks.Must(databricks.NewWorkspaceClient(&databricks.Config{
		Host:         "https://host.cloud.databricks.com/",
		ClientSecret: "",
		ClientID:     "",
	}))

	// Open the JSON file
	file, err := os.Open("data.json")
	if err != nil {
		fmt.Println("Error opening file:", err)
		return
	}
	defer file.Close()

	// Read the file's content
	byteValue, err := io.ReadAll(file)
	if err != nil {
		fmt.Println("Error reading file:", err)
		return
	}

	// Unmarshal the JSON content into the struct
	var dataframe serving.DataframeSplitInput
	err = json.Unmarshal(byteValue, &dataframe)
	if err != nil {
		fmt.Println("Error unmarshalling JSON:", err)
		return
	}

	// Print the struct to verify the content
	fmt.Printf("%+v\n", dataframe)

	request := serving.QueryEndpointInput{
		Name:           "model_name",
		DataframeSplit: &dataframe,
	}

	response, err := w.ServingEndpoints.Query(context.Background(), request)
	if err != nil {
		panic(err)
	}
	fmt.Println(response.Predictions)
}

Expected behavior
Use optimized endpoint host when the model serving is route optimized.

Other Information

• Version: 0.42.0