chore: complete phase 0 - update decisions.md and mark phase complete

documentation/decisions.md

@@ -143,8 +143,15 @@ Then `sudo sysctl -p` or restart Docker.
 - [x] Set up ESLint + Prettier with shared configs in root
 - [x] Set up Vitest in `api` and `web` and both packages
 - [x] Scaffold Express app with `GET /api/health`
-- [x] Scaffold Vite + React app with TanStack Router (single root route) — **in progress**
+- [x] Scaffold Vite + React app with TanStack Router (single root route)
+- [x] Configure Drizzle ORM + connection to local PostgreSQL
+- [x] Write first migration (empty — just validates the pipeline works)
+- [x] `docker-compose.yml` for local dev: `api`, `web`, `postgres`, `valkey`
+- [x] `.env.example` files for `apps/api` and `apps/web`
+- [x] update decisions.md
+
+Phase 0 is finished with this.
 
 ### Current checkpoint
 
-Setting up TanStack Router in `apps/web` with a single root route.
+- [ ] Run `scripts/extract_omw.py` locally → generates `packages/db/src/seed.json`