tests: detect avatar BUSY ACK repeats with ACK counter

tests/test_group_avatar.c

@@ -130,14 +130,15 @@ int main(void) {
     // Проверяем остановку доставки и повтор BUSY ACK, затем сразу переходим к restart.
     struct ETCP_ROUTER_CONN* sender = etcp_router_conn_get(nodes[0], GROUP, nodes[1]->node_id, ETCP_RT_ID_GROUP_AVATAR);
     struct ETCP_ROUTER_CONN* receiver = etcp_router_conn_get(nodes[1], GROUP, nodes[0]->node_id, ETCP_RT_ID_GROUP_AVATAR);
-    uint64_t hold_started = get_time_tb(), first_busy_ack = 0;
+    uint64_t hold_started = get_time_tb();
+    uint32_t first_busy_ack = 0;
     int busy_repeated = 0;
     deadline = hold_started + 20000;
     while (get_time_tb() < deadline) {
         uasync_poll(ua, 2);
         if (!receiver->receive_blocked || !sender->peer_receive_blocked) continue;
-        if (!first_busy_ack) first_busy_ack = sender->last_ack_changed_tb;
-        else if (sender->last_ack_changed_tb != first_busy_ack) { busy_repeated = 1; break; }
+        if (!first_busy_ack) first_busy_ack = sender->c_stale_ack;
+        else if (sender->c_stale_ack != first_busy_ack) { busy_repeated = 1; break; }
     }
     if (!busy_repeated) DEBUG_ERROR(DEBUG_CATEGORY_CHAT, "test group avatar: BUSY ACK repeat missing blocked=%u peer_blocked=%u",
                                     receiver->receive_blocked, sender->peer_receive_blocked);