fix: auto_socket TCP hang + missing debug config apply in utun_instance_create_from_config

auto_socket.c: remove tsrv from inst->stcp_servers before stcp_link_server_destroy
when TCP socket has null addr — freed pointer stayed in linked list corrupting it
on next stcp_server_listen->stcp_server_list_add, causing hang

utun_instance.c: apply debug_level + per-category debug from config in
utun_instance_create_from_config (was only in utun_instance_create)

chat_core.c: verbose error log on invalid args

src/utun_instance.c

@@ -368,6 +368,11 @@ struct UTUN_INSTANCE* utun_instance_create_from_config(struct UASYNC* ua, struct
         return NULL;
     }
     
+    if (config->global.debug_level[0])
+        debug_apply_global_level(config->global.debug_level);
+    for (int i = 0; i < config->global.debug_levels.count; i++)
+        debug_apply_category_config(config->global.debug_levels.category[i],
+                                     config->global.debug_levels.level[i]);
     // Allocate instance
     struct UTUN_INSTANCE *instance = u_calloc(1, sizeof(struct UTUN_INSTANCE));
     if (!instance) {