Module registry 

Generic handler registry providing thread-safe handler storage.

This module provides HandlerRegistry, a reusable building block for storing and iterating over trait object handlers behind Arc.

Architecture

The registry uses interior mutability via RwLock to allow handler registration without requiring mutable access. This enables sharing the registry across async boundaries and multiple components.

Execution Model

Handlers are stored in registration order. The registry itself does not define execution semantics — callers iterate over handlers and decide how to dispatch them (fail-fast, best-effort, etc.).

Structs

HandlerRegistry 🔒

A thread-safe, ordered collection of handlers.