Metrics for end of game

[NBKelly]

This adds a couple of functions to gather some anonymous data (fully compliant with the GDPR).

Essentially what we're gathering is:

1. Number of players who play, number of games played, number of new accounts made -> daily
2. An index of cards, their playrate, the faction and id they're played in, and a tiny metric for scoring those cards -> just compound the data until we get restarted, but log it daily

These are stored in ~/jinteki/analytics/..., and will not be publicly accessible.

Why?

1. Closes Feature Request: player engagement metrics #8582. This is both legal and ethical. No personally identifiable information is used whatsoever.
2. A couple of users wanted this for a research project, and I think it's both legal and ethical to provide in this case. The data is all mixed in such a way that it's impossible to identify any information about any player from it.

My metric for scoring:

• 3.5 points for a win
• If you lose, your agenda point total - 3.5

[Cluedrew]

Am I correct in that identifying information and details are not just inaccessible but completely erased? I have heard stories of people being able to reverse engineer "private concealed" data from data bases that were supposed to hide it, although I don't know enough to say anything definitive about it.

[NBKelly]

Yeah, they are completely erased. No store is made in any database of any identifying information, or saved to disk. It's as anonymous as we can get (having a temporary state, like the lobby list).