Session 52: Coming Soon teaser + infrastructure verification (2239 tests)

Phase 1 — Push-to-Book teaser (feature not live; teaser only):
- StatStrip: "BOOK IT ⟶" per graded prop (hover: "Push-to-Book coming soon").
- GradeResultCard: "PUSH-TO-BOOK · COMING SOON" footer.

Phase 2 — infrastructure verification:
- snapshotScheduler logs armed AND disarmed state (incl SNAPSHOT_CRON) so
  container logs disambiguate off-vs-crashed.
- NEW GET /api/internal/snapshot/status (internal-key gated): cron_armed,
  cron_hours_utc, last_snapshot per sport (gradeCount/deltaCount), redis_keys
  existence map, ticker_count. The post-deploy pipeline health probe.
- Finding: Redis AOF/RDB persistence is a server-side (Coolify) config the app
  can't set/verify — documented.

Phase 3 — delta pipeline (verified sound, no fix needed):
- runSnapshot already rotates :latest->:previous and diffs locked lines; added
  opt-in SNAPSHOT_DEBUG=1 [deltas] log + a trace test asserting :previous is
  preserved verbatim and the delta math is correct.

Backend 2234 -> 2239 tests (+5), 192 suites. Web build clean (exit 0).

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

tests/unit/bookItTeaser.test.js

@@ -0,0 +1,22 @@
+// Session 52 — Push-to-Book "Coming Soon" teaser (source-asserted).
+
+const fs = require('fs');
+const path = require('path');
+const WEB = path.join(__dirname, '..', '..', 'web', 'src');
+const read = (rel) => fs.readFileSync(path.join(WEB, rel), 'utf8');
+
+describe('BOOK IT teaser', () => {
+  it('StatStrip renders the "BOOK IT" teaser on graded props', () => {
+    const src = read('components/vyndr/StatStrip.tsx');
+    expect(src).toContain('BookItTeaser');
+    expect(src).toContain('BOOK IT ⟶');
+    expect(src).toContain('Push-to-Book coming soon');
+    expect(src).toContain('<BookItTeaser p={p} />');
+  });
+
+  it('GradeResultCard renders "PUSH-TO-BOOK · COMING SOON"', () => {
+    const src = read('components/vyndr/GradeResultCard.tsx');
+    expect(src).toContain('PUSH-TO-BOOK · COMING SOON');
+    expect(src).toContain('Connect DraftKings, FanDuel, BetMGM');
+  });
+});