fix: clean duplicate logging, use proper AD lookup with debug

instruct/handlers.py

@@ -68,6 +68,10 @@ def _get_user_cn(user_id: str) -> str:
 @router.message()
 async def instruct_router_handler(msg: Message):
     user_id = msg.from_user.id
+    user_name = getattr(msg.from_user, 'name', 'N/A')
+    user_username = getattr(msg.from_user, 'username', 'N/A')
+
+    logger.info(f"Instruct: user_id={user_id}, name={user_name}, username={user_username}")
 
     current_state = get_state(user_id)