Add categories and suppliers with CRUD routes

- category table with hierarchical parent_id, sort ordering, soft-delete
- supplier table with contact info, account number, payment terms
- CRUD routes for both with search on suppliers
- Zod validation schemas in @forte/shared
- Products will link to suppliers via join table (many-to-many)
- 26 tests passing

packages/backend/src/main.ts

@@ -8,6 +8,7 @@ import { devAuthPlugin } from './plugins/dev-auth.js'
 import { healthRoutes } from './routes/v1/health.js'
 import { authRoutes } from './routes/v1/auth.js'
 import { accountRoutes } from './routes/v1/accounts.js'
+import { inventoryRoutes } from './routes/v1/inventory.js'
 
 export async function buildApp() {
   const app = Fastify({
@@ -35,6 +36,7 @@ export async function buildApp() {
   await app.register(healthRoutes, { prefix: '/v1' })
   await app.register(authRoutes, { prefix: '/v1' })
   await app.register(accountRoutes, { prefix: '/v1' })
+  await app.register(inventoryRoutes, { prefix: '/v1' })
 
   return app
 }