Cache Component

• Inject `CacheInterface` (PSR-16 contract). Use `$cache->get($key, fn($item) => ...)` — runs the callable only on miss.
• Set TTL via `$item->expiresAfter(3600)` inside the callable.
• Tag-based invalidation (TagAwareAdapter) lets you bust groups of entries by tag.
• Pools live under `framework.cache.pools` — name them, scope them to specific adapters, inject by name with `#[Target(\'app.cache\')]`.
• Doctrine\'s second-level cache and result cache use the same adapters.
• Clear with `bin/console cache:pool:clear <pool_name>`.

use Symfony\Contracts\Cache\CacheInterface;
use Symfony\Contracts\Cache\ItemInterface;

$value = $cache->get('user_'.$id, function (ItemInterface $item) use ($id) {
    $item->expiresAfter(3600);
    return $this->repo->find($id);
});