[BUG] `Api.Shutdown()` hangs on reuse

[austindrenski]

Observed behavior

Stumbled onto this while investigating failing unit tests add as part of #181 that fail when run in concert, but pass when run independently.

Working theory is that we're not restarting the consumer thread. Patch forthcoming.

See: #181

Expected Behavior

No response

Steps to reproduce

No response

[austindrenski]

Ah, okay, its blocking on the bounded channel inside of EventExecuter. Looking at a couple of options.