Session 55: Self-learning loop + real-time layer (2274 tests)

Product overhaul core — the two transformative, differentiated systems:

Self-learning loop (Phase 2): outcomeService settles locked snapshot grades
against real MLB Stats API results → hit/miss/push, rolling accuracy by grade
tier (30d window). Idempotent, injectable, unit-tested. New GET /api/accuracy +
/api/ledger/accuracy + internal settle triggers + cron hook. AccuracyBadge
(dashboard/scan/landing) is honest — "LEARNING" below MIN_SAMPLE, never a fake
number. Settled HIT/MISS chips overlay the live slate.

Real-time layer (Phase 1): Slate silent 60s auto-refresh (no flash, no wipe on
transient blips) + "SIGNAL LIVE · UPDATED Xs ago" freshness strip; Ticker LIVE
badge that flashes on fresh events.

Landing (Phase 3): TopSignals shows tonight's real top-3 A-rated grades + live
accuracy — the product shown, not described.

Founder pricing: FOUNDER_CODE_EXPIRY default 2026-06-30 → 2026-12-31 (had
lapsed, disabling every founder code + the ClaimMeter pitch). That expiry — not
a tier change — was the real cause of the 4 stripe test failures.

Backend 2255 (4 failing) → 2274 (all green; +19 new, +4 fixed). Web build exit 0.

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

src/app.js

@@ -155,6 +155,10 @@ const snapshotReadRoutes = require('./routes/snapshot');
 app.use('/api/snapshot', snapshotReadRoutes);
 // Session 51 — Team Hub (roster + archetypes + graded props). Public, cached.
 app.use('/api/team', require('./routes/team'));
+// Session 55 — self-learning loop: the system's rolling accuracy record
+// (settled snapshot grades vs real results). Public, cache-only.
+app.use('/api/accuracy', require('./routes/accuracy'));
+app.use('/api/ledger', require('./routes/ledger'));
 const gameLinesRoutes = require('./routes/gameLines');
 app.use('/api/gamelines', gameLinesRoutes);
 const streaksRoutes = require('./routes/streaks');