Contract 7.1.12

The game tools after the Elixir Gym's fourth run on them (feedback #296-#298), and a clan's own place on the clan ladder (#294).

• game_events says when the window touches a game day whose events read fell outside it: a Chicago Monday is mostly game day 09-21, read at 09-22T09:02Z, and that day's events were missing with no word (#296).
• game_events takes season, as every windowed tool does (#297).
• game_clock carries is_colosseum, weeks_in_season and colosseum_starts_at: a season holds 4 or 5 weeks, so the week number alone did not say Colosseum (#298).
• rankings_clan_ladder serves snapshot.floor_score and our_clan, the caller's clan's rank or, off the board, its score and gap to the last place. clans_roster serves clan_score, clan_war_trophies and scores_observed_at; the ladder note no longer calls clan score a sum (#294).

Additive.