fix: memory pool alloc mismatch in tests, db_sync SEND_DATA buffer overflow

- test_etcp_router_reconnect, test_etcp_connect, test_stcp_traffic:
  replace u_calloc with memory_pool_alloc for TOPO_SOCKMETA4/TOPO_ADDR4
- db_sync.c: fix req[14] -> req[15] — SEND_DATA request header is 15 bytes
  (type:1 + from:4 + count:2 + vp:4 + want_from:4)

src/routing_layer/route6_lib.h

@@ -48,7 +48,7 @@ FDxx/8 - опциональные ipv6 подсети узлов /64 (если
 
 struct ROUTE6_DATA {
     struct radix_node rn_nodes[2];   // scratch-буфер для rn_addroute
-    struct TOPO_NODEQ *v_node_info;  // узел-владелец
+    struct TOPO_GROUP_NODE *v_node_info;  // узел-владелец
     uint64_t node_id;                // ключ для hash-поиска в ll_queue
     uint8_t  prefix_length;          // 0..128
     uint8_t  key[17];                // sockaddr-like: {len=17, addr[16]}
@@ -66,8 +66,8 @@ struct ROUTE6_TABLE {
 
 struct ROUTE6_TABLE *route6_table_create(struct UASYNC *ua);
 void route6_table_destroy(struct ROUTE6_TABLE *table);
-bool route6_insert(struct ROUTE6_TABLE *table, struct TOPO_NODEQ *node);
-void route6_delete(struct ROUTE6_TABLE *table, struct TOPO_NODEQ *node);
+bool route6_insert(struct ROUTE6_TABLE *table, struct TOPO_GROUP_NODE *node);
+void route6_delete(struct ROUTE6_TABLE *table, struct TOPO_GROUP_NODE *node);
 const struct ROUTE6_DATA *route6_lookup(struct ROUTE6_TABLE *table, const uint8_t addr[16]);