Fix ETCP test: server connection registration and packet handling

- etcp_connections.c: Add incoming server connections to instance->connections list
- test_etcp_simple_traffic.c: Fix ETCP_FRAGMENT handling in check_packet_received()
- test_etcp_simple_traffic.c: Fix packet size check (ETCP adds headers to payload)
- Reduced debug verbosity in ll_queue.c and debug_config.c

tests/test_etcp_simple_traffic.c

@@ -155,25 +155,31 @@ static void check_packet_received(void) {
     DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "check_packet_received: Server output_queue count: %d", queue_entry_count(conn->output_queue));
     
     // Check if there's any packet in output queue
-    void* data = queue_data_get(conn->output_queue);
-    if (data) {
+    struct ETCP_FRAGMENT* pkt = queue_data_get(conn->output_queue);
+    if (pkt) {
         DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "check_packet_received: Found packet in output queue");
-        
-        // В новом API размер данных нужно получать из структуры
-        struct ll_entry* entry = (struct ll_entry*)data - 1;
-        size_t size = entry->size;
-        
+
+        // ETCP_FRAGMENT содержит ll_entry в начале, данные в pkt_data
+        size_t size = pkt->ll.size;
+        uint8_t* data = pkt->pkt_data;
+
         DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "check_packet_received: Packet size=%zu, expected=%d", size, PACKET_SIZE);
-        DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "check_packet_received: First byte received=%02X, expected=%02X", 
-                    ((uint8_t*)data)[0], test_packet_data[0]);
-        
-        if (size == PACKET_SIZE && memcmp(data, test_packet_data, PACKET_SIZE) == 0) {
+        DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "check_packet_received: First byte received=%02X, expected=%02X",
+                    data[0], test_packet_data[0]);
+
+        // Проверяем только данные (первые PACKET_SIZE байт), размер может включать ETCP заголовки
+        if (size >= PACKET_SIZE && memcmp(data, test_packet_data, PACKET_SIZE) == 0) {
             packet_received = 1;
             DEBUG_INFO(DEBUG_CATEGORY_ETCP, "check_packet_received: SUCCESS - Packet received in server output queue (%zu bytes), data matches", size);
         } else {
-            DEBUG_WARN(DEBUG_CATEGORY_ETCP, "check_packet_received: Packet received but size mismatch or data differs (expected %d, got %zu)", PACKET_SIZE, size);
+            DEBUG_WARN(DEBUG_CATEGORY_ETCP, "check_packet_received: Packet received but data differs (expected %d bytes, got %zu)", PACKET_SIZE, size);
         }
-        queue_data_free(data);
+
+        // Освобождаем ETCP_FRAGMENT и данные
+        if (pkt->pkt_data) {
+            memory_pool_free(conn->instance->data_pool, pkt->pkt_data);
+        }
+        queue_data_free(pkt);
     } else {
         DEBUG_TRACE(DEBUG_CATEGORY_ETCP, "check_packet_received: No packet found in output queue");
     }