fix: make profiler configurable and disable it by default in non-debug mode (#1243)

The profiler.yaml was loaded unconditionally, causing GraphQLCollector's
event listener to run on every GraphQL request in production — parsing
queries and deep-cloning results for data that was never consumed.

Add an `enabled` option to the `profiler` configuration section,
defaulting to `kernel.debug`. This allows explicit control while
ensuring profiler services are only registered in dev/test by default.

Author: martiis

src/DependencyInjection/Configuration.php

@@ -311,6 +311,7 @@ private function profilerSection(): ArrayNodeDefinition
 
         // @phpstan-ignore-next-line
         $node
+            ->{$this->debug ? 'canBeDisabled' : 'canBeEnabled'}()
             ->addDefaultsIfNotSet()
             ->children()
                 ->scalarNode('query_match')->defaultNull()->end()

src/DependencyInjection/OverblogGraphQLExtension.php

@@ -38,10 +38,10 @@ final class OverblogGraphQLExtension extends Extension
 {
     public function load(array $configs, ContainerBuilder $container): void
     {
-        $this->loadConfigFiles($container);
         $configuration = $this->getConfiguration($configs, $container);
         $config = $this->processConfiguration($configuration, $configs);
 
+        $this->loadConfigFiles($config, $container);
         $this->setBatchingMethod($config, $container);
         $this->setServicesAliases($config, $container);
         $this->setSchemaBuilderArguments($config, $container);
@@ -75,7 +75,7 @@ public function getConfiguration(array $config, ContainerBuilder $container): Co
         );
     }
 
-    private function loadConfigFiles(ContainerBuilder $container): void
+    private function loadConfigFiles(array $config, ContainerBuilder $container): void
     {
         $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.yaml');
@@ -86,7 +86,10 @@ private function loadConfigFiles(ContainerBuilder $container): void
         $loader->load('expression_language_functions.yaml');
         $loader->load('definition_config_processors.yaml');
         $loader->load('aliases.yaml');
-        $loader->load('profiler.yaml');
+
+        if ($config['profiler']['enabled']) {
+            $loader->load('profiler.yaml');
+        }
     }
 
     private function registerForAutoconfiguration(ContainerBuilder $container): void
@@ -143,6 +146,10 @@ private function setDefinitionParameters(array $config, ContainerBuilder $contai
 
     private function setProfilerParameters(array $config, ContainerBuilder $container): void
     {
+        if (!$config['profiler']['enabled']) {
+            return;
+        }
+
         $container->setParameter($this->getAlias().'.profiler.query_match', $config['profiler']['query_match']);
     }