fix: swap queue_entry_free/queue_dgram_free order in 27 places — prevents UAF when dgram_free accesses freed entry

uasync: replace raw socket_node* handle with packed index — fixes UAF after socket_array realloc
tcp_io: defer u_free in tcp_conn_destroy via uasync_call_soon — prevents callback-chain UAF
tcp_io: guard read_cb/write_cb with NULL queue checks after deferred destroy
tcp_io: save read_queue to local before queue_data_put + NULL guard after
route_connectivity: linked-list probe_ctx — cancel all parallel probes before nq free

src/proxy/icmp_proxy.c

@@ -173,7 +173,7 @@ drop:
 // Сторона клиента: принять REPLY, доставить echo ответ в TUN
 // ====================================================================
 static void client_handle_reply(struct ETCP_CONN* conn, struct ll_entry* entry) {
-    if (entry->len < ICMP_PROXY_HDR_SIZE + 1) { queue_entry_free(entry); queue_dgram_free(entry); return; }
+    if (entry->len < ICMP_PROXY_HDR_SIZE + 1) { queue_dgram_free(entry); queue_entry_free(entry); return; }
     uint32_t src_ip;
     uint32_t orig_src_ip;
     uint16_t echo_id, echo_seq;
@@ -194,7 +194,7 @@ static void client_handle_reply(struct ETCP_CONN* conn, struct ll_entry* entry)
 // ====================================================================
 void icmp_proxy_recv_cb(struct ETCP_CONN* conn, struct ll_entry* entry) {
     if (!entry || !entry->dgram || entry->len < 2) {
-        if (entry) { queue_entry_free(entry); queue_dgram_free(entry); }
+        if (entry) { queue_dgram_free(entry); queue_entry_free(entry); }
         return;
     }
     uint8_t subcmd = entry->dgram[1];

src/proxy/udp_proxy.c

@@ -114,7 +114,7 @@ drop:
 // Сторона клиента: принять REPLY, доставить в TUN
 // ====================================================================
 static void client_handle_reply(struct ETCP_CONN* conn, struct ll_entry* entry) {
-    if (entry->len < UDP_PROXY_HDR_SIZE + 1) { queue_entry_free(entry); queue_dgram_free(entry); return; }
+    if (entry->len < UDP_PROXY_HDR_SIZE + 1) { queue_dgram_free(entry); queue_entry_free(entry); return; }
     // svc_id уже обработан диспетчером etcp_router
     uint32_t src_ip, dst_ip;
     uint16_t src_port, dst_port;
@@ -136,7 +136,7 @@ static void client_handle_reply(struct ETCP_CONN* conn, struct ll_entry* entry)
 // ====================================================================
 void udp_proxy_recv_cb(struct ETCP_CONN* conn, struct ll_entry* entry) {
     if (!entry || !entry->dgram || entry->len < 2) {
-        if (entry) { queue_entry_free(entry); queue_dgram_free(entry); }
+        if (entry) { queue_dgram_free(entry); queue_entry_free(entry); }
         return;
     }
     uint8_t subcmd = entry->dgram[1];