Add PRs/Best Efforts and segment achievements that expire after 90 days

[DVE]

Just like with Zwift, it would be nice to have 90 PRs and placements as well as the normal overall PRs. This could be just on a user or on a user and the segments as a whole. 

As you get older or things happen, sometimes those older PRs are just not achievable or in reach any longer.

[Jane]

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