Prakhar Pratyush d6c48b7185 delete_message: Fix recipients of "delete_message" event. ...

Earlier, we were sending 'delete_message' event to all active
subscribers of the stream.

We shouldn't send event to those users who don't have access
to the deleted message in a private stream with protected history.

This commit fixes that bug.

Also, now we use 'event_recipient_ids_for_action_on_messages'.
It helps to add hardening such that if the invariant "no usermessage
row corresponding to a message exists if the user loses access to the
message" is violated due to some bug, it has minimal user impact.

2024-10-07 11:35:06 -07:00

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