fix: show correct "Game X of 7" for future playoff dates

Enrich raw score-endpoint games with gameNumber from the series cache
before parsing. The score API omits gameNumber and its seriesStatus
reflects current wins, so all future games in a series computed the
same number. Now we cross-reference by game id against the cached
series-detail endpoint which includes the correct gameNumber per game.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/routes.py

@@ -18,6 +18,7 @@ from app.playoff import today_meta
 from app.bracket_view import build_bracket_view
 from app.playoff_cache import (
     day_n_for_round,
+    enrich_game_numbers,
     fetch_series,
     get_bracket,
     parse_series_id,
@@ -118,6 +119,7 @@ def get_scoreboard():
 
     if scoreboard_data:
         raw_games = scoreboard_data.get("games", [])
+        enrich_game_numbers(raw_games)
         games = parse_games(scoreboard_data)
         max_round = _max_playoff_round(raw_games)
         n = day_n_for_round(max_round) if max_round else None