feat: Feature 1.5 — Bet Submission with 3 methods + performance tracking

Three submission methods:
- POST /api/bets/quickslip — structured bet entry
- POST /api/bets/screenshot — stub OCR with confirm flow
- POST /api/bets/sync — coming soon stub

Full bet lifecycle:
- PATCH /api/bets/:id/settle — settle with outcome, recalculates performance
- GET /api/bets — list with status/book/pagination filters
- GET /api/bets/performance — ROI, win rate, profit (weekly/monthly/all_time)

Payout calculator handles straight bets (American odds) and parlays
(multiplied leg payouts). Performance service recalculates on each
settlement and upserts into performance table.

33 new tests, 221 total (194 Node.js + 27 Python), all passing.
All backend features for Phase 1 + Phase 2 now complete.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app.js

@@ -5,6 +5,7 @@ const analyzeRoutes = require('./routes/analyze');
 const scanRoutes = require('./routes/scan');
 const movementsRoutes = require('./routes/movements');
 const alertsRoutes = require('./routes/alerts');
+const betsRoutes = require('./routes/bets');
 
 const app = express();
 app.use(express.json());
@@ -13,5 +14,6 @@ app.use('/api/analyze', analyzeRoutes);
 app.use('/api/scan', scanRoutes);
 app.use('/api/movements', movementsRoutes);
 app.use('/api/alerts', alertsRoutes);
+app.use('/api/bets', betsRoutes);
 
 module.exports = app;