Session 45: Snapshot pipeline + GameCard swap + live ticker (2100 tests)

The on-demand "Read" grade model is RETIRED. A scheduled pipeline pre-grades the
slate, locks grades to the line, tracks movement; the dashboard shows them already
there. Orchestrates existing services — nothing rebuilt.

- snapshotService.runSnapshot(sport): getOdds → gradeAndCacheSlate → classify
  archetype per player → lock gradedAt → line deltas vs previous snapshot → write
  snapshot:{sport}:latest/previous + grades:{sport} → ticker events. Fully
  injectable, zero-network unit tests. runAllSnapshots = cron entrypoint.
- Internal trigger POST /api/internal/snapshot/:sport + /all (requireInternalAuth).
  In-process cron (SNAPSHOT_CRON=1, UTC 14,19,22,1,3) in server.js, no new dep.
- Public reads: GET /api/snapshot/:sport (cache-only) + GET /api/ticker (merges
  TICKER_MANUAL pins) + Next proxies.
- GameCard swap: live Slate renders vyndr/GameCard (legacy kept for types only),
  overlays locked grades onto game props → player name once + archetype badge +
  "Graded Xh ago at -115 · Current 2.5 · ▲ TOWARD +1.0". Ungraded → "Awaiting next
  scan", NO Read button. On-demand onGrade flow deleted.
- Ticker polls /api/ticker every 30s, graceful fallback to hardcoded items.
- NBA/WNBA: espnStatsAdapter free fallback (defensive parse → found:false on shape
  mismatch) wired into resolvePlayerStats after the offline Python service.

Env: PROPLINE_API_KEY_1/2/3, VYNDR_INTERNAL_KEY, SNAPSHOT_CRON=1, TICKER_MANUAL.
Backend 2061 -> 2100 tests (+39), 173 suites. Web build clean (exit 0).

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

src/app.js

@@ -144,6 +144,13 @@ app.use('/api/widget', widgetRoutes);
 // stat-filtered views over all of them.
 const scheduleRoutes = require('./routes/schedule');
 app.use('/api/schedule', scheduleRoutes);
+// Session 45 — live ticker feed (snapshot exhaust + editorial pins). Public,
+// cache-only, never triggers a snapshot.
+const tickerRoutes = require('./routes/ticker');
+app.use('/api/ticker', tickerRoutes);
+// Session 45 — pre-graded slate read (snapshot:{sport}:latest). Public, cache-only.
+const snapshotReadRoutes = require('./routes/snapshot');
+app.use('/api/snapshot', snapshotReadRoutes);
 const gameLinesRoutes = require('./routes/gameLines');
 app.use('/api/gamelines', gameLinesRoutes);
 const streaksRoutes = require('./routes/streaks');