fix warning

Author: ChristopheFerreboeuf

src/Core/Scan/Processor/NoProxyInCommands.php

@@ -20,7 +20,7 @@ public function getIdentifier(): string
      */
     public function process(array $files): void
     {
-        foreach ($files['di'] as $file) {
+        foreach ($files['di'] ?? [] as $file) {
             $previousUseErrors = libxml_use_internal_errors(true);
             $content = simplexml_load_file($file);
             libxml_clear_errors();

src/Core/Scan/Processor/ProxyForHeavyClasses.php

@@ -22,6 +22,7 @@ class ProxyForHeavyClasses extends AbstractProcessor
      */
     private array $heavyClassPatterns = [
         'Session',
+        'Collection',
     ];
 
     private array $processedFiles = [];