* feat: add Microservices Bulkhead pattern (#3228)
* fix: cancel queued calls on bulkhead shutdown
Shutdown now cancels the queued futures so callers do not hang, a shutdown racing a submit is no longer counted as a rejection, and interrupted inventory checks are logged. The class diagram is a rendered PNG.
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Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>
