feat(backend): add fastify api, auth, prisma schema and jobs

apps/backend/src/plugins/guest.ts

@@ -0,0 +1,25 @@
+import fp from 'fastify-plugin';
+import { nanoid } from 'nanoid';
+import { env } from '../config/env.js';
+
+export const GUEST_COOKIE = 'fw_gid';
+const GUEST_COOKIE_MAX_AGE = 60 * 60 * 24 * 365 * 2; // 2 years
+
+export default fp(async (app) => {
+  app.addHook('onRequest', async (request, reply) => {
+    const existing = request.cookies[GUEST_COOKIE];
+    if (existing && existing.length >= 16 && existing.length <= 64) {
+      request.guestId = existing;
+      return;
+    }
+    const id = nanoid(24);
+    request.guestId = id;
+    reply.setCookie(GUEST_COOKIE, id, {
+      httpOnly: true,
+      secure: env.NODE_ENV === 'production',
+      sameSite: 'lax',
+      path: '/',
+      maxAge: GUEST_COOKIE_MAX_AGE,
+    });
+  });
+});