Per-player special-teams time on ice for a match

Per-player power-play, short-handed, even-strength and overtime ice time for one match, in whole seconds, plus total ice time and shift count. Ice hockey requires the Edge plan or higher. Access for every other sport on this shared route is unchanged. UNITS AND ARITHMETIC: every value is whole seconds, and even_strength_time_on_ice_seconds + power_play_time_on_ice_seconds + short_handed_time_on_ice_seconds equals time_on_ice_seconds. overtime_time_on_ice_seconds is an OVERLAY that is already counted inside those three and must not be added to them. player_id is null when we have not yet bridged that player to a Big Balls player id; player_name is always present. Coverage is partial and is being extended by season, so a match we do not yet hold returns 200 with an empty players array and a meta.coverage note rather than a 404.