fix(redis): use named RedisOptions type so npm run check passes

ioredis v5 dropped the namespace merge on the default export, so
`Redis.RedisOptions` resolves to TS2702 (type used as a namespace).
Import the `RedisOptions` type by name instead.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/lib/server/redisConnector.ts

@@ -1,5 +1,6 @@
 import IORedis from "ioredis";
 import Redis from "ioredis";
+import type { RedisOptions } from "ioredis";
 import dotenv from "dotenv";
 dotenv.config();
 
@@ -17,7 +18,7 @@ function shouldReconnectAfterRedisError(message: string): boolean {
   return false;
 }
 
-const redisClientOptions: Redis.RedisOptions = {
+const redisClientOptions: RedisOptions = {
   maxRetriesPerRequest: null,
   // Detect dead peers during long K8s / network stalls (default ioredis keepAlive is off).
   keepAlive: 30000,