Add a /health endpoint to the Rust Daemon

[CodNoob100]

Context: Currently, the core Rust daemon (
ulld) does not expose a standard health check endpoint. This makes it difficult for tools like Docker or Kubernetes to automatically verify if the service has successfully started and is ready to accept connections.
Task:

1. Open the Rust daemon source file (crates/nulld/src/main.rs).
2. Create a new async function called handle_health that simply returns an HTTP 200 OK with a JSON payload like {"status": "ok"}.
3. Register this new route in the Axum Router block (around line 130) as .route(/health, get(handle_health)).
   Files to Touch: crates/nulld/src/main.rs`nSuccess Criteria: Running cargo run --bin nulld and executing curl http://127.0.0.1:3000/health should return a 200 OK response with the JSON status.

[light89219]

Hi @CodNoob100 , I would love to work on this ticket. could you please assign it to me?

[CodNoob100]

Hi @light89219! Thank you for volunteering. I have assigned this issue to you.

Since you are a new contributor to null-drift, please make sure you carefully read our CONTRIBUTING.md file before submitting a Pull Request.

Here are some of the critical rules we strictly enforce via our CI pipelines:

1. Code Quality & Linting:
   • Rust: Your code must pass cargo fmt --check and cargo clippy with a strict zero-warnings policy (-D warnings).
   • Python: Your code must pass black --check and flake8.
2. Dead Code: Using #[allow(dead_code)] or #[allow(unused)] is strictly forbidden.
3. TODO Formats: Any TODO comments must include a link to a tracking issue (e.g. // TODO(issue #123)) and they automatically expire after 30 days!
4. Dependencies: Make sure you don't introduce duplicate crate versions (cargo tree --duplicates).
5. Changelog: Please update CHANGELOG.md under the [Unreleased] section with your changes.

We look forward to your contribution. Let us know if you have any questions!