Fall back to sendMessage if the response to /events is too long

[nmlorg]

In response to /events:

2024-08-06 15:56:45,562 ERROR loop.py:72] Ignoring uncaught error while dispatching:
Traceback (most recent call last):
  File "lib/python3.10/site-packages/ntelebot/loop.py", line 70, in run
    callback()
  File "lib/python3.10/site-packages/metabot/multibot.py", line 143, in __call__
    msg.reply(ctx)
  File "lib/python3.10/site-packages/metabot/util/msgbuilder.py", line 89, in reply
    return ctx.reply_html('\n\n'.join(lines), disable_web_page_preview=True, **kwargs)
  File "lib/python3.10/site-packages/ntelebot/preprocess.py", line 137, in reply_html
    return self.reply_text(text, *args, **kwargs)
  File "lib/python3.10/site-packages/ntelebot/preprocess.py", line 183, in reply_text
    return method(chat_id=self.chat['id'], **kwargs)
  File "lib/python3.10/site-packages/ntelebot/bot.py", line 71, in __call__
    raise ntelebot.errors.Error(data)
ntelebot.errors.Error: {'ok': False, 'error_code': 400, 'description': 'Bad Request: message caption is too long'}

 
I believe this is just another form of #76 (see f341e83).