Initial scaffold: Turborepo monorepo + design wiki

Turborepo (pnpm workspaces) with all dependencies pinned to latest
mutually-compatible versions: turbo 2.9, TypeScript 6, Fastify 5,
React 19, Vite 8, better-sqlite3 12 + Drizzle ORM 0.45.

Layout:
- apps/server   Fastify backend (local JWT auth + role guard, /health)
- apps/web      React 19 + Vite 8 operator SPA
- packages/db   Drizzle schema on SQLite/WAL; append-only events + users
- packages/devices  reader/printer/relay adapter interfaces (intent-only relay)
- packages/shared   shared domain types

Architecture constraints from the design wiki are encoded in the scaffold:
append-only hash-chained + signed event log, device-agnostic adapters,
"a barrier is not a door" (relay expresses intent only), fully-local
offline-first auth.

wiki/ is an LLM-maintained Obsidian knowledge base (28 pages) ingested
from the architecture & design notes, with its own maintenance schema.

Verified: pnpm install, full turbo build (5/5), server boots and serves
/health, drizzle-kit generates the initial migration.

packages/db/package.json

@@ -0,0 +1,36 @@
+{
+  "name": "@parking/db",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "default": "./dist/index.js"
+    },
+    "./schema": {
+      "types": "./dist/schema.d.ts",
+      "default": "./dist/schema.js"
+    }
+  },
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "scripts": {
+    "build": "tsc -b",
+    "dev": "tsc -b --watch",
+    "typecheck": "tsc --noEmit",
+    "lint": "tsc --noEmit",
+    "db:generate": "drizzle-kit generate",
+    "db:migrate": "drizzle-kit migrate"
+  },
+  "dependencies": {
+    "@parking/shared": "workspace:*",
+    "better-sqlite3": "12.10.1",
+    "drizzle-orm": "0.45.2"
+  },
+  "devDependencies": {
+    "@types/better-sqlite3": "7.6.13",
+    "drizzle-kit": "0.31.10",
+    "typescript": "6.0.3"
+  }
+}