Add cron job for removing expired stored objects

Introduced `RemoveExpiredStoredObjectCronJob` to automate the deletion of expired stored objects every 7 days. Enhanced associated tests and updated relevant interfaces and classes to support the new cron job functionality.

src/Bundle/ChillDocStoreBundle/Entity/StoredObjectVersion.php

@@ -33,6 +33,13 @@ class StoredObjectVersion implements TrackCreationInterface
     #[ORM\Column(type: \Doctrine\DBAL\Types\Types::INTEGER)]
     private ?int $id = null;
 
+    /**
+     * The stored object associated with this version.
+     */
+    #[ORM\ManyToOne(targetEntity: StoredObject::class, inversedBy: 'versions')]
+    #[ORM\JoinColumn(name: 'stored_object_id', nullable: true)]
+    private ?StoredObject $storedObject;
+
     /**
      * filename of the version in the stored object.
      */
@@ -40,12 +47,7 @@ class StoredObjectVersion implements TrackCreationInterface
     private string $filename = '';
 
     public function __construct(
-        /**
-         * The stored object associated with this version.
-         */
-        #[ORM\ManyToOne(targetEntity: StoredObject::class, inversedBy: 'versions')]
-        #[ORM\JoinColumn(name: 'stored_object_id', nullable: true)]
-        private StoredObject $storedObject,
+        StoredObject $storedObject,
 
         /**
          * The incremental version.
@@ -76,6 +78,7 @@ class StoredObjectVersion implements TrackCreationInterface
         private string $type = '',
         ?string $filename = null,
     ) {
+        $this->storedObject = $storedObject;
         $this->filename = $filename ?? self::generateFilename($this);
     }
 
@@ -124,4 +127,12 @@ class StoredObjectVersion implements TrackCreationInterface
     {
         return $this->version;
     }
+
+    /**
+     * @internal to be used by StoredObject::removeVersion
+     */
+    public function resetStoredObject(): void
+    {
+        $this->storedObject = null;
+    }
 }