Test: add etcp_conn_reinit stub to fail standalone test if called

tests/test_pkt_normalizer_standalone.c

@@ -12,6 +12,13 @@
 #include "../src/pkt_normalizer.h"
 #include "../src/etcp.h"
 
+// Stub for etcp_conn_reinit - should not be called in standalone test
+void etcp_conn_reinit(struct ETCP_CONN* etcp) {
+    (void)etcp;
+    fprintf(stderr, "FAIL: etcp_conn_reinit called - ETCP not initialized in standalone test!\n");
+    exit(1);
+}
+
 #define TOTAL_PACKETS 100
 #define MIN_PACKET_SIZE 10
 #define MAX_PACKET_SIZE 3000