Scraper hangs when it fails to add an item (due to duplicate path)

[benoit74]

See https://farm.openzim.org/pipeline/5aeecbde-8389-4717-86d4-ab34a748fcc5/debug

I had to manually cancel the task to make it stop.

I reproduce the issue locally. I will investigate.

[benoit74]

This is not a scraper issue but something at a higher level.

This is not a blocker for release (very likely same issue is present in most scraper and we do not intend to create duplicate items with the scraper).