Clean up test_etcp_api: set WARN level, remove obsolete comments

tests/test_etcp_api.c

@@ -27,20 +27,9 @@
 #include "../lib/debug_config.h"
 
 #define TEST_TIMEOUT_MS 3000  // 3 second timeout
-/* 
- * NOTE: This test demonstrates ETCP API usage (etcp_send/etcp_bind).
- * 
- * CURRENT LIMITATION: The test may fail because pkt_normalizer packer aggregates
- * packets into ~1536 byte chunks, which exceeds ETCP's max payload of 1480 bytes.
- * This causes encrypt_send to fail with "error 1" (len > 1480).
- * 
- * The test is functional for demonstrating the API pattern, but full packet
- * transfer requires fixing the packer to respect frag_size=mtu-100=1400.
- */
-
 #define TOTAL_PACKETS 100      // Total packets to send
 #define MIN_PACKET_SIZE 10      // Minimum packet size  
-#define MAX_TEST_PACKET_SIZE 500   // Maximum packet size - packer aggregates packets
+#define MAX_TEST_PACKET_SIZE 500   // Maximum packet size (packer aggregates)
 
 // Packet header size: seq(2) + size(2) + checksum(2) = 6 bytes
 #define PACKET_HEADER_SIZE 6
@@ -463,8 +452,7 @@ int main() {
            total_bytes, (float)total_bytes / TOTAL_PACKETS / 1024);
     
     debug_config_init();
-//    debug_set_level(DEBUG_LEVEL_WARN);
-    debug_set_level(DEBUG_LEVEL_TRACE);
+    debug_set_level(DEBUG_LEVEL_WARN);
     debug_set_categories(DEBUG_CATEGORY_ALL);
     
     utun_instance_set_tun_init_enabled(0);