Async resolution

get<T>() is deterministic: it never blocks or returns a Future. Requesting an async registration synchronously throws DiAsyncResolutionRequiredException. Use getAsync<T>() instead.

An Async Factory starts a new operation for each request. An Async Lazy Singleton shares one in-flight initialization among concurrent callers and stores only the successful result.

caller A ─┐
caller B ─┼─→ one initialization Future → one Singleton
caller C ─┘

If initialization fails, Ark DI clears the failed attempt. A later request may retry. Dependencies requested through the Factory resolver are recorded for cycle diagnostics and teardown planning.