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.

wiki/entities/lpr-camera.md

@@ -0,0 +1,22 @@
+---
+type: entity
+tags: [parking, hardware, readers, offline-first]
+sources: [parking-system-architecture]
+updated: 2026-06-14
+---
+
+# LPR Camera
+
+License-plate-recognition camera (recommended: **Milesight edge-AI LPR**). For
+**casual/transient** vehicles, the **plate acts as ticket + an independent record**. (See
+[[parking-system-architecture]] §8, §9.)
+
+- **Edge AI**: recognition runs **on-device**, so it keeps working with no internet — fits
+  [[offline-first]].
+- It's a **host-side** identity source: only the host sees the read; the host decides and
+  commands the relay open (the [[uhppote-controller]] is demoted to a commanded relay for that
+  lane). See [[entry-exit-readers]].
+- Being host-in-the-loop is **good for fraud detection** — you get two independent records (the
+  host's signed [[append-only-event-chain]] entry + the controller's remote-open event) that
+  should reconcile one-to-one; any mismatch is an anomaly.
+- Mounting: within ~15° of vehicle travel at a controlled chokepoint for best reads.