refactor: simplify Redis configuration initialization

- Use RedisConfig::fromEnvironment() in LoggerInitializer
- Remove fallback logic in QueueInitializer, always use connection pool
- Make RedisConfig constructor private
- Clean up Redis connection error message

src/Framework/Queue/QueueInitializer.php

@@ -32,19 +32,9 @@ final readonly class QueueInitializer
             }
 
             // Try to use Redis connection pool if available, otherwise create direct connection
-            $redisConnection = null;
-            if ($this->container->has(RedisConnectionPool::class)) {
-                $pool = $this->container->get(RedisConnectionPool::class);
-                $redisConnection = $pool->getQueueConnection();
-            } else {
-                // Fallback to direct connection creation
-                $redisConfig = new RedisConfig(
-                    host: 'redis',
-                    port: 6379,
-                    database: 2 // Use DB 2 for queue
-                );
-                $redisConnection = new RedisConnection($redisConfig, 'queue');
-            }
+
+            $pool = $this->container->get(RedisConnectionPool::class);
+            $redisConnection = $pool->getQueueConnection();
 
             return new RedisQueue(
                 connection: $redisConnection,