feat(01-01): Drizzle schema + DB client + /health slice (GREEN)
- src/db/schema.ts: users, memberCredentials, calendars, calendarEvents tables
- users: composite unique on oidc_iss+oidc_sub (D-10 identity)
- calendar_events: separate dtstart_utc (TIMESTAMP) and dtstart_date (DATE) + allDay boolean (D-13)
- src/db/client.ts: drizzle(mysql2 pool) singleton export `db`
- drizzle.config.ts: dialect mysql, schema → migrations, dbCredentials from env
- src/routes/health.ts: GET / with real SELECT 1 DB round-trip, 200 or 503
- src/index.ts: Hono app with /health mounted before auth, serveStatic for PWA
- tests/health.test.ts: 2 tests pass (mocked DB); TDD GREEN gate
- apps/pwa/src/App.tsx: React shell fetching /health via TanStack Query
Lucas Berger
96cda58509