feat(genai): Add generate content with routing option

Author: nardosalemu

genai/content_cache/contentcache_create_with_txt_gcs_pdf.go

@@ -21,6 +21,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"time"
 
 	genai "google.golang.org/genai"
 )
@@ -65,7 +66,7 @@ func createContentCache(w io.Writer) (string, error) {
 			},
 		},
 		DisplayName: "example-cache",
-		TTL:         "86400s",
+		TTL:         time.Duration(86400),
 	}
 
 	res, err := client.Caches.Create(ctx, modelName, config)

genai/content_cache/contentcache_update.go

@@ -38,7 +38,7 @@ func updateContentCache(w io.Writer, cacheName string) error {
 
 	// Update expire time using TTL
 	resp, err := client.Caches.Update(ctx, cacheName, &genai.UpdateCachedContentConfig{
-		TTL: int64(36000),
+		TTL: time.Duration(36000),
 	})
 	if err != nil {
 		return fmt.Errorf("failed to update content cache exp. time with TTL: %w", err)