Session 32: Grades pipeline + NFL/NHL wiring + rate limiting + audit cleanup (1718 tests)

- gradeSlateService writes grades:{sport} cache (closes content pipeline →
  dataLevel full); fire-and-forget from oddsService.recordDownstream, gated
  by shouldGradeSlate (off in test, GRADE_SLATE_ON_FETCH override)
- NFL/NHL wired: oddsService SPORT_KEYS/SPORT_MARKETS (correct the-odds-api
  keys americanfootball_nfl/icehockey_nhl), proplineAdapter MARKETS, NHL
  MARKET_MAP keys to avoid silent-zero
- rate limiting mounted on 8 public cached routers (odds/parlay 30/min,
  rest 60/min)
- jsonlLogger writes to temp under test (no more dirtied tracked artifact);
  5MB pipeline test given 20s timeout

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/services/adapters/proplineAdapter.js

@@ -47,8 +47,8 @@ const MARKETS = {
   nba: ['player_points', 'player_rebounds', 'player_assists', 'player_threes', 'player_blocks', 'player_steals'],
   wnba: ['player_points', 'player_rebounds', 'player_assists', 'player_threes'],
   mlb: ['batter_hits', 'batter_home_runs', 'batter_total_bases', 'batter_rbis', 'batter_stolen_bases', 'pitcher_strikeouts'],
-  nfl: [],
-  nhl: [],
+  nfl: ['player_pass_yds', 'player_rush_yds', 'player_reception_yds', 'player_receptions', 'player_anytime_td', 'player_pass_tds'],
+  nhl: ['player_goals', 'player_shots_on_goal', 'goalie_saves'],
   ncaab: ['player_points', 'player_rebounds', 'player_assists'],
 };