topo_group: диагностика senders_list (new_conn/remove_conn) для локализации UAF

- new_conn: DEBUG_INFO ADD с conn/peer/state/ch
- remove_conn: state в enter-логе, детали в !found_in_list WARN, REMOVED-лог

src/routing_layer/topo_group.c

@@ -707,6 +707,9 @@ void topo_group_new_conn(struct TOPO_GROUP* group, struct ETCP_CONN* conn) {
         peer_nq->conn_up |= NCONN_DIRECT;
         if (conn->instance->topo_sqlite_db) topo_node_sqlite_nodeinfo_updated(conn->instance->topo_sqlite_db, conn->peer_node_id);
     }
+    DEBUG_INFO(DEBUG_CATEGORY_BGP, "topo_group_new_conn: ADD conn=%p peer=%016llx state=%d grp=%016llx ch=%s",
+               (void*)conn, (unsigned long long)conn->peer_node_id, conn->state,
+               (unsigned long long)group->group_id, group->channel_id);
     topo_group_add_to_senders(group, conn);
 
     /* BGP — владелец conn: держим NCD-handle (если ещё нет), чтобы соединение
@@ -741,11 +744,11 @@ void topo_group_remove_conn(struct TOPO_GROUP* group, struct ETCP_CONN* conn) {
     bool found_in_list = false;
     struct ll_entry* e = group->senders_list->head;
     while (e) { struct TOPO_GROUP_CONN_ITEM* item = (struct TOPO_GROUP_CONN_ITEM*)e->data; if (item->conn == conn) { found_in_list = true; break; } e = e->next; }
-    if (!found_in_list) { DEBUG_WARN(DEBUG_CATEGORY_BGP, "conn already removed or not in list, skipping"); return; }
+    if (!found_in_list) { DEBUG_WARN(DEBUG_CATEGORY_BGP, "topo_group_remove_conn: conn=%p peer=%016llx state=%d NOT in senders_list (already removed?), skip grp=%016llx ch=%s", (void*)conn, (unsigned long long)conn->peer_node_id, conn->state, (unsigned long long)group->group_id, group->channel_id); return; }
 
-    DEBUG_INFO(DEBUG_CATEGORY_BGP, "senders_remove conn=%p peer=%016llx name='%s' grp=%016llx",
-               (void*)conn, (unsigned long long)conn->peer_node_id, conn->log_name,
-               (unsigned long long)group->group_id);
+    DEBUG_INFO(DEBUG_CATEGORY_BGP, "topo_group_remove_conn: conn=%p peer=%016llx state=%d name='%s' grp=%016llx ch=%s",
+               (void*)conn, (unsigned long long)conn->peer_node_id, conn->state, conn->log_name,
+               (unsigned long long)group->group_id, group->channel_id);
 
     struct ROUTE_TABLE* rt = conn->instance->rt;
     int nodes_removed = 0;
@@ -797,6 +800,9 @@ void topo_group_remove_conn(struct TOPO_GROUP* group, struct ETCP_CONN* conn) {
             item->handle = NULL;
             queue_remove_data(group->senders_list, e);
             queue_entry_free(e);
+            DEBUG_INFO(DEBUG_CATEGORY_BGP, "topo_group_remove_conn: REMOVED conn=%p peer=%016llx from senders_list grp=%016llx ch=%s",
+                       (void*)conn, (unsigned long long)conn->peer_node_id,
+                       (unsigned long long)group->group_id, group->channel_id);
             if (h) {
                 node_conn_direct_close(h);
                 DEBUG_DEBUG(DEBUG_CATEGORY_BGP, "topo_group_remove_conn: BGP handle released node=0x%016llx", (unsigned long long)conn->peer_node_id);