Fix build with `--features google` (#2566)

* Fix `cargo build --features google`

* Add `cargo test --features google`

.github/workflows/tests.yaml

@@ -58,3 +58,6 @@ jobs:
       - name: Run Rust tests
         run: |
           cargo test
+      - name: Run Rust tests with google feature
+        run: |
+          cargo test --features google

router/src/server.rs

@@ -2029,7 +2029,8 @@ async fn start(
 
     #[cfg(feature = "google")]
     {
-        use crate::VertexInstance;
+        use crate::vertex::__path_vertex_compatibility;
+        use crate::vertex::{VertexInstance, VertexRequest, VertexResponse};
 
         #[derive(OpenApi)]
         #[openapi(