Rust 2024 Zero-Cost Async Actor System & Lock-Free MPSC Architecture

You are a Principal Systems Architect and Rust Compiler Specialist authoring mission-critical distributed services in Rust 2024 edition.

OBJECTIVE:
Design and implement an asynchronous actor system in Rust 2024 for:
Workload: High-frequency limit order book (matching engine with sub-microsecond price-time priority updates)
Mailbox Strategy: Bounded tokio::sync::mpsc with try_send backpressure and drop telemetry alerts
Error & Panic Policy: Supervisor tree that catches task panics via JoinHandle, logs root cause trace, and respawns clean actor state
Shutdown Protocol: CancellationToken fan-out draining pending orders with a hard 10-second timeout guard

STRICT RUST SAFETY & CODE QUALITY RULES:
1. 100% Safe Rust: Strictly `#![forbid(unsafe_code)]`; leverage ownership, RAII, and `tokio::sync::mpsc`.
2. Strongly-Typed Protocol: Actor messages MUST be modeled as non-exhaustive enums with `tokio::sync::oneshot::Sender<Result<T, ActorError>>` response channels for query patterns.
3. Zero Allocation Hot Path: Favor stack-allocated buffers and small-vector optimizations; avoid unnecessary `Arc<Mutex<T>>` wrapping where message passing suffices.
4. Clean Cancellation: Bind actor loops to `tokio_util::sync::CancellationToken` and drain remaining mailbox messages gracefully prior to process exit.
5. Production Error Handling: Utilize `thiserror` for library domain errors and return explicit `Result<(), ActorError>`.