feat: Feature 1.2 (NBA stats FastAPI service) + Feature 1.4 (database schema)

Feature 1.2: Python FastAPI microservice wrapping nba_api
- GET /stats/season-avg, /stats/last-n, /stats/splits, /players/search
- Redis caching (24hr/1hr/6hr/7day), 0.6s rate limiting, PRA derived stat
- 27 Python tests passing

Feature 1.4: Complete Supabase database schema
- 6 tables: users, picks, scan_sessions, bets, outcomes, performance
- RLS enabled on all tables with auth.uid() policies
- 3 triggers: auto-create user, updated_at, scan count reset
- 37 schema validation tests passing
- Migration SQL ready, pending manual apply (WSL2 DNS blocker)

Total: 92 tests (65 Node.js + 27 Python), all passing

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

.gitignore

@@ -4,3 +4,10 @@ node_modules/
 dist/
 coverage/
 *.log
+
+# Python
+__pycache__/
+*.pyc
+venv/
+.pytest_cache/
+.temp/