fix: make event queue sink removal idempotent#1134

dorlugasigal wants to merge 2 commits into

a2aproject:maina2aproject/a2a-python:mainfrom

dorlugasigal:fix/idempotent-event-queue-sink-closedorlugasigal/a2a-python:fix/idempotent-event-queue-sink-closeCopy head branch name to clipboard