For get and filter queries of NamedUserGroup, realm_for_sharding
field is used instead of realm field, as directly using
realm_for_sharding field on NamedUserGroup makes the query faster
than using realm present on the base UserGroup table.
Anonymous groups were being created for stream permission
settings when calling the subscriptions endpoint without
any streams data or when calling it only for subscribing
users to streams and not for creating any new streams.
This commit makes sure that no such unused anonymous groups
are created.
This commit renames `stream_creator_or_nobody` value for
`default_group_name` field in `server_supported_permission_settings`
object to `channel_creator`.
Removes send_new_subscription_messages parameter from
`POST channel/create` endpoint as Notification Bot DMs
are never sent when users are subscribed as part of
creating a new channel.
Not considered a documentable API change, since the previous parameter
never had any effect, so this is effectively just a documentation and
error-handling bug fix, not an API change relevant to implementors.
When a user is added to a channel, we send
the user that was added a Notification Bot
DMs to let them know about it.
In this commit, we add an option for whether or not
this message is sent.
If more than 100 users are added at once, we
do not send notification bot DMs since it would
be a performance-costly operation.
We also send this threshold value of 100 in the
initial state data to the clients.
Fixes part of #31189
