Clarify the workers that the ThirdPartyRules' on_new_event callback will run on (#15071)

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Andrew Morgan 2023-02-22 16:05:34 +00:00 committed by GitHub
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Clarify which worker processes the ThirdPartyRules' [`on_new_event`](https://matrix-org.github.io/synapse/v1.78/modules/third_party_rules_callbacks.html#on_new_event) module API callback runs on.

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@ -146,6 +146,9 @@ Note that this callback is called when the event has already been processed and
into the room, which means this callback cannot be used to deny persisting the event. To
deny an incoming event, see [`check_event_for_spam`](spam_checker_callbacks.md#check_event_for_spam) instead.
For any given event, this callback will be called on every worker process, even if that worker will not end up
acting on that event. This callback will not be called for events that are marked as rejected.
If multiple modules implement this callback, Synapse runs them all in order.
### `check_can_shutdown_room`