cloudflare/pingora ? reverse-engineered prompt

Build me a Rust library for fast, reliable network services, focused on an HTTP proxy and load balancer that can be used as a foundation for real production systems.

I want it to support HTTP 1 and 2, TLS, websocket and gRPC proxying, graceful reloads, load balancing, failover, and basic observability hooks. Make it feel like a real framework that someone can build custom proxy logic on top of, not just a demo app. If caching fits naturally, include it, but keep that part clearly experimental and simple. Please organize it as a reusable workspace with a small public facing crate and a few internal crates for core protocol logic, proxy behavior, load balancing, errors, timeouts, and optional TLS backends. Keep it async, efficient, and Linux friendly, but don’t make it Windows only.

Look up current docs online if you need to, and aim for something that could realistically be used as the base for a high traffic service.