fix: add missing redis client connect call in onModuleInit

ioredis with lazyConnect: true requires explicit .connect() — without it
the client never connects and isHealthy() always returns false.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/infrastructure/redis/redis.service.ts

@@ -32,6 +32,12 @@ export class RedisService implements OnModuleInit, OnModuleDestroy {
       this._connected = false;
       this.logger.warn(`Redis error: ${err.message}`);
     });
+
+    try {
+      await this.client.connect();
+    } catch (err: any) {
+      this.logger.warn(`Redis connect failed: ${err.message}`);
+    }
   }
 
   async onModuleDestroy() {