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

packages/backend/src/db/seed.ts

@@ -0,0 +1,50 @@
+import postgres from 'postgres'
+import { drizzle } from 'drizzle-orm/postgres-js'
+import { companies, locations } from './schema/stores.js'
+
+const DEV_COMPANY_ID = '00000000-0000-0000-0000-000000000001'
+const DEV_LOCATION_ID = '00000000-0000-0000-0000-000000000010'
+
+async function seed() {
+  const connectionString =
+    process.env.DATABASE_URL ?? 'postgresql://forte:forte@localhost:5432/forte'
+  const sql = postgres(connectionString)
+  const db = drizzle(sql)
+
+  console.log('Seeding database...')
+
+  await db
+    .insert(companies)
+    .values({
+      id: DEV_COMPANY_ID,
+      name: 'Dev Music Co.',
+      timezone: 'America/Chicago',
+    })
+    .onConflictDoNothing()
+
+  await db
+    .insert(locations)
+    .values({
+      id: DEV_LOCATION_ID,
+      companyId: DEV_COMPANY_ID,
+      name: 'Main Store',
+      address: {
+        street: '123 Main St',
+        city: 'Austin',
+        state: 'TX',
+        zip: '78701',
+      },
+    })
+    .onConflictDoNothing()
+
+  console.log(`Seeded dev company: ${DEV_COMPANY_ID}`)
+  console.log(`Seeded dev location: ${DEV_LOCATION_ID}`)
+
+  await sql.end()
+  console.log('Done.')
+}
+
+seed().catch((err) => {
+  console.error('Seed failed:', err)
+  process.exit(1)
+})