Read stats file one last time on exit

[benoit74]

• Location: Worker

Problem

The task stats are not updated one last time when the container has finished. This leads to weird situations where a ZIM has been created but progress is not yet at 100%. This is a bit confusing. We should have a last update of the stats when the container exits.

Example: https://farm.openzim.org/pipeline/236e948c-ec49-4fed-ae05-0fb0e1492506/debug