Contract 7.1.8

The player tools after the Elixir Gym's fourth run on them (feedback #275-#278).

• season_trophies, season_best_trophies and players_profile.snapshot.league_statistics are described as what they are: the API's legacy leagueStatistics, which mirrors Trophy Road and holds a frozen best, not the seasonal Trophy Road; a note says so when the metrics are asked for and points at progress_key (#275).
• players_profile serves snapshot.progress, each side-mode bucket's latest reading (Merge Tactics, 2v2 League, the seasonal Trophy Road), and the recording docs describe the progress readers that shipped (#276).
• Every place that described kind: pre_reset as the week's donation total calls it a lower bound, as the notes do (#277).

Additive.