# Grid4 Node Example (OurDB)

This example demonstrates how to use the Grid4 `Node` model against the embedded OurDB backend.

- Creates an in-memory/on-disk OurDB under `/tmp`.
- Demonstrates CRUD and simple index lookups on `country`, `nodegroupid`, and `pubkey`.

Run it:

```bash
cargo run -p heromodels --example grid4_example
```