LogDog: Add project namespace to service endpoint.

client/internal/logdog/butler/bundler/bundler.go

Index: client/internal/logdog/butler/bundler/bundler.go
diff --git a/client/internal/logdog/butler/bundler/bundler.go b/client/internal/logdog/butler/bundler/bundler.go
index 9ce9bf37ca8953f993d815d2cdd1322642828afb..58ab07029d0e72a7a390293711762ab2662a1ccf 100644
--- a/client/internal/logdog/butler/bundler/bundler.go
+++ b/client/internal/logdog/butler/bundler/bundler.go
@@ -119,7 +119,7 @@ func (b *Bundler) Register(p streamproto.Properties) (Stream, error) {
 	}
 
 	// Generate a secret for this Stream instance.
-	c.template.Secret, err = types.NewStreamSecret()
+	c.template.Secret, err = types.NewPrefixSecret()
 	if err != nil {
 		return nil, fmt.Errorf("failed to generate stream secret: %s", err)
 	}