New contact field "updated", fix warnings

src/Worker/UpdateContact.php

@@ -8,12 +8,21 @@ namespace Friendica\Worker;
 
 use Friendica\Core\Logger;
 use Friendica\Model\Contact;
+use Friendica\Util\DateTimeFormat;
+use Friendica\Database\DBA;
 
 class UpdateContact
 {
 	public static function execute($contact_id)
 	{
 		$success = Contact::updateFromProbe($contact_id);
+		// Update the "updated" field if the contact could be probed.
+		// We don't do this in the function above, since we don't want to
+		// update the contact whenever that function is called from anywhere.
+		if ($success) {
+			DBA::update('contact', ['updated' => DateTimeFormat::utcNow()], ['id' => $contact_id]);
+		}
+
 		Logger::info('Updated from probe', ['id' => $contact_id, 'success' => $success]);
 	}
 }