add accessKey to entity workflow step

src/Bundle/ChillMainBundle/Entity/Workflow/EntityWorkflowStep.php

@@ -86,7 +86,7 @@ class EntityWorkflowStep
     private ?string $transitionAfter = null;
 
     /**
-     * @ORM\Column(type="datetime_immutable")
+     * @ORM\Column(type="datetime_immutable", nullable=true, options={"default": null})
      */
     private ?DateTimeImmutable $transitionAt = null;
 
@@ -101,9 +101,15 @@ class EntityWorkflowStep
      */
     private ?string $transitionByEmail = null;
 
+    /**
+     * @ORM\Column(type="text", nullable=false)
+     */
+    private string $accessKey;
+
     public function __construct()
     {
         $this->destUser = new ArrayCollection();
+        $this->accessKey = bin2hex(openssl_random_pseudo_bytes(32));
     }
 
     public function addDestEmail(string $email): self
@@ -119,6 +125,9 @@ class EntityWorkflowStep
     {
         if (!$this->destUser->contains($user)) {
             $this->destUser[] = $user;
+            $this->getEntityWorkflow()
+                ->addSubscriberToFinal($user)
+                ->addSubscriberToStep($user);
         }
 
         return $this;