ghbountybot railway-cron .cursorrules file for Rust

If lint errors:
- first try just running `cargo clippy --fix --allow-dirty --allow-staged && cargo fmt`

If adding a dependency
- do not modify `Cargo.toml`; just run `cargo add <dependency1> <dependency2> ...`

When debugging:
- Use `tracing` crate (`tracing::debug!`, `tracing::trace!`) and `tracing-subscriber` to log messages. Run with `RUST_LOG=trace {cmd}` for best results.