Phase 1: Monorepo scaffold, database, and dev environment

Turborepo monorepo with @forte/shared and @forte/backend workspaces.
Docker Compose dev env with PostgreSQL 16 + Valkey 8.
Fastify server with Pino JSON logging, request ID tracing, and
health endpoint. Drizzle ORM with company + location tables.

Includes:
- Root config (turbo, tsconfig, eslint, prettier)
- @forte/shared: types, schemas, currency/date utils
- @forte/backend: Fastify entry, plugins (database, redis, cors,
  error-handler, dev-auth), health route, Drizzle schema + migration
- Dev auth bypass via X-Dev-Company/Location/User headers
- Vitest integration test with clean DB per test (forte_test)
- Seed script for dev company + location

package.json

@@ -0,0 +1,20 @@
+{
+  "name": "forte",
+  "private": true,
+  "workspaces": ["packages/*"],
+  "scripts": {
+    "dev": "turbo run dev",
+    "build": "turbo run build",
+    "test": "turbo run test",
+    "lint": "turbo run lint",
+    "format": "prettier --write .",
+    "format:check": "prettier --check ."
+  },
+  "devDependencies": {
+    "turbo": "^2",
+    "prettier": "^3",
+    "eslint": "^9",
+    "typescript": "^5",
+    "typescript-eslint": "^8"
+  }
+}