* sse implementation that sheds stuck clients
* Radek and James feedback
* Refactor event streamer code for readability
* less-flaky test signaling
* test case where queue fills; fixes
* add changelog entry
* james and preston feedback
* swap our Subscription interface with an alias
* event.Data can be nil for the payload attr event
* deepsource
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Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>