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/auth/passkeys.get.ts

@@ -0,0 +1,11 @@
+import { requireAuth } from '../../utils/auth'
+import { listUserPasskeys } from '../../utils/user-repository'
+
+export default defineEventHandler(async (event) => {
+  const auth = await requireAuth(event)
+  const passkeys = await listUserPasskeys(auth.user.id)
+
+  return {
+    passkeys
+  }
+})