fix(crawler): fix failed webhook

[brunoocasali]

Today, when any error happens in the crawler the listener (webhook) is not being triggered.

This should be fixed, and the failed handler should be implemented in the listener as well (cloud)

[bidoubiwa]

I think it does trigger a failure. Can you provide an example?

[brunoocasali]

It comes from that perspective when we are hit by the cache. The user will see a timeout instead, but in reality, we have no data and no timeout error at all.

So even being a "expected" behavior, for the user perspective it is an error/failure.