fix: move group push work off topic loop

server/store/group_message_runtime_test.go

@@ -127,6 +127,10 @@ func (r *testGroupMessageRuntime) GetUserPresence(types.TenantID, types.Uid) (*U
 	return nil, nil
 }
 
+func (r *testGroupMessageRuntime) GetUsersPresence(types.TenantID, []types.Uid) (map[types.Uid]*UserPresence, error) {
+	return map[types.Uid]*UserPresence{}, nil
+}
+
 func (r *testGroupMessageRuntime) MarkTopicMemberOnline(types.TenantID, string, types.Uid, string) error {
 	return nil
 }