Add history: keep track of the data we measure for future comparisons

[magopian]

Refs #196

We should keep an history to understand how we are doing compared to the previous releases at the same time (beginning of the cycle, end, etc). If needed, we could make progress to integrate the cycle span into product-details.
It means that we will have to store the data that we are retrieving.

[sylvestre]

This stuff is key!

[magopian]

How important is it compared to adding the new checks? Is the "historization" important for the current checks?
Are the new checks useful even without the historization?

Trying to prioritize on what to work on first.