Upgrade group avatar columns before notifying database readiness

tests/test_group_avatar.c

@@ -119,6 +119,10 @@ int main(void) {
         group_x, NULL, group_public, NULL, signature));
     assert(!group_avatar_get(nodes[0], GROUP, &copy) && copy.version == first.version);
     uint8_t private_key[32]; assert(!topo_node_sqlite_channel_get_priv(nodes[0]->topo_sqlite_db, CHANNEL, private_key));
+    uint8_t wrong_pub[32] = {1};
+    assert(topo_node_sqlite_channel_put(nodes[0]->topo_sqlite_db, CHANNEL, "avatar", nodes[0]->node_id,
+        group_x, NULL, wrong_pub, NULL, signature) < 0);
+    assert(!group_avatar_get(nodes[0], GROUP, &copy) && copy.version == first.version);
 
     etcp_router_set_receive_ready(nodes[1], ETCP_RT_ID_GROUP_AVATAR, hold);
     image[0] ^= 1; assert(!group_avatar_set(nodes[0], GROUP, image, 4097));