hydra-db/hydradb ? reverse-engineered prompt

Build me a Rust graph database that stores its data durably in object storage and can run locally for development with a simple demo setup. I want to be able to start one node, write a small graph, query it back with a Cypher style query, stop the process, start it again, and still have the data there. It should support both a Neo4j compatible Bolt connection and a simple HTTP API for queries, with basic auth, readiness checks, and sensible limits so it does not run away with memory or requests.

Please wire up whatever is needed for local testing too, so I can create a tiny graph, run a smoke test, and see that reads and writes work end to end. If you need to check current docs for any dependencies or integration details, look them up online. Keep the default experience straightforward, and make the local development path easy to follow.