clear references

README.md

@@ -52,7 +52,7 @@ Unified SolidStart monolith with tRPC, Drizzle ORM, and native mobile apps.
 └────────────────────────┼──────────────────────────────────────┘
                          │
                 ┌────────▼────────┐
-                │   PostgreSQL    │
+                │   Turso (SQLite)│
                 │   + Redis       │
                 └─────────────────┘
 ```
@@ -79,7 +79,7 @@ kordant/
 ├── docs/                     # Brand guidelines, runbooks
 ├── scripts/                  # Build and deployment scripts
 ├── tasks/                    # Project task tracking
-├── docker-compose.yml        # Local dev (web + postgres + redis)
+├── docker-compose.yml        # Local dev (web + redis; DB is external Turso)
 ├── docker-compose.prod.yml   # Production deployment
 └── .github/workflows/        # CI/CD pipelines
 ```
@@ -93,7 +93,7 @@ kordant/
 | **Language** | TypeScript (Node.js ≥22) |
 | **Framework** | SolidStart (SSR + API server) |
 | **API** | tRPC (type-safe RPC) |
-| **Database** | PostgreSQL 16 (Drizzle ORM) |
+| **Database** | Turso / SQLite (Drizzle ORM) |
 | **Cache / Queue** | Redis 7 |
 | **Styling** | Tailwind CSS + CSS custom properties |
 | **Mobile iOS** | SwiftUI (native) |