Skip processing of meta tokens in Telegram bot response handling

bot.py

@@ -102,6 +102,9 @@ async def handle_message(update: Update, context: ContextTypes.DEFAULT_TYPE) ->
                     await reply_msg.edit_text(accumulated)
                 break
 
+            if isinstance(token, dict) and "__meta" in token:
+                continue  # 진행 메시지는 Telegram에 표시하지 않음
+
             accumulated += token
 
             now = time.monotonic()