Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/symfony/mailer/DelayedEnvelope.php

@@ -1,98 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\Mailer;
-
-use Symfony\Component\Mailer\Exception\LogicException;
-use Symfony\Component\Mime\Address;
-use Symfony\Component\Mime\Header\Headers;
-use Symfony\Component\Mime\Message;
-
-/**
- * @author Fabien Potencier <fabien@symfony.com>
- *
- * @internal
- */
-final class DelayedEnvelope extends Envelope
-{
-    private bool $senderSet = false;
-    private bool $recipientsSet = false;
-    private Message $message;
-
-    public function __construct(Message $message)
-    {
-        $this->message = $message;
-    }
-
-    public function setSender(Address $sender): void
-    {
-        parent::setSender($sender);
-
-        $this->senderSet = true;
-    }
-
-    public function getSender(): Address
-    {
-        if (!$this->senderSet) {
-            parent::setSender(self::getSenderFromHeaders($this->message->getHeaders()));
-        }
-
-        return parent::getSender();
-    }
-
-    public function setRecipients(array $recipients): void
-    {
-        parent::setRecipients($recipients);
-
-        $this->recipientsSet = (bool) parent::getRecipients();
-    }
-
-    /**
-     * @return Address[]
-     */
-    public function getRecipients(): array
-    {
-        if ($this->recipientsSet) {
-            return parent::getRecipients();
-        }
-
-        return self::getRecipientsFromHeaders($this->message->getHeaders());
-    }
-
-    private static function getRecipientsFromHeaders(Headers $headers): array
-    {
-        $recipients = [];
-        foreach (['to', 'cc', 'bcc'] as $name) {
-            foreach ($headers->all($name) as $header) {
-                foreach ($header->getAddresses() as $address) {
-                    $recipients[] = $address;
-                }
-            }
-        }
-
-        return $recipients;
-    }
-
-    private static function getSenderFromHeaders(Headers $headers): Address
-    {
-        if ($sender = $headers->get('Sender')) {
-            return $sender->getAddress();
-        }
-        if ($return = $headers->get('Return-Path')) {
-            return $return->getAddress();
-        }
-        if ($from = $headers->get('From')) {
-            return $from->getAddresses()[0];
-        }
-
-        throw new LogicException('Unable to determine the sender of the message.');
-    }
-}