Extend AutomationPutEndpoint to receive meta data

[MAILPOET-4966]

mailpoet/lib/Automation/Engine/Builder/UpdateAutomationController.php

@@ -66,6 +66,13 @@ class UpdateAutomationController {
       }
     }
 
+    $automation->deleteMetas();
+    if (array_key_exists('meta', $data)) {
+      foreach ($data['meta'] as $key => $value) {
+        $automation->setMeta($key, $value);
+      }
+    }
+
     $this->hooks->doAutomationBeforeSave($automation);
 
     $this->automationValidator->validate($automation);

mailpoet/lib/Automation/Engine/Endpoints/Automations/AutomationsPutEndpoint.php

@@ -37,6 +37,7 @@ class AutomationsPutEndpoint extends Endpoint {
       'name' => Builder::string()->minLength(1),
       'status' => Builder::string(),
       'steps' => AutomationSchema::getStepsSchema(),
+      'meta' => Builder::object(),
     ];
   }
 }