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/utils/redis.ts

@@ -0,0 +1,20 @@
+import { createClient, type RedisClientType } from 'redis'
+
+let redisClientPromise: Promise<RedisClientType> | null = null
+
+export async function getRedisClient() {
+  if (!redisClientPromise) {
+    const config = useRuntimeConfig()
+    const client = createClient({
+      url: config.redisUrl || 'redis://127.0.0.1:6379'
+    })
+
+    client.on('error', (error) => {
+      console.error('Redis connection error', error)
+    })
+
+    redisClientPromise = client.connect().then(() => client)
+  }
+
+  return redisClientPromise
+}