feat: implement auth system, passkeys, and user management

Add PostgreSQL and Redis integration for users and sessions
Implement password and WebAuthn passkey login flows
Add Docker stack, super-admin seeding, and protected routes

server/api/public/contacts.get.ts

@@ -0,0 +1,7 @@
+import { listPublicContacts } from '../../utils/user-repository'
+
+export default defineEventHandler(async () => {
+  return {
+    contacts: await listPublicContacts()
+  }
+})