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/http-foundation/Session/Attribute/AttributeBag.php

@@ -1,130 +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\HttpFoundation\Session\Attribute;
-
-/**
- * This class relates to session attribute storage.
- *
- * @implements \IteratorAggregate<string, mixed>
- */
-class AttributeBag implements AttributeBagInterface, \IteratorAggregate, \Countable
-{
-    private string $name = 'attributes';
-    private string $storageKey;
-
-    protected $attributes = [];
-
-    /**
-     * @param string $storageKey The key used to store attributes in the session
-     */
-    public function __construct(string $storageKey = '_sf2_attributes')
-    {
-        $this->storageKey = $storageKey;
-    }
-
-    public function getName(): string
-    {
-        return $this->name;
-    }
-
-    /**
-     * @return void
-     */
-    public function setName(string $name)
-    {
-        $this->name = $name;
-    }
-
-    /**
-     * @return void
-     */
-    public function initialize(array &$attributes)
-    {
-        $this->attributes = &$attributes;
-    }
-
-    public function getStorageKey(): string
-    {
-        return $this->storageKey;
-    }
-
-    public function has(string $name): bool
-    {
-        return \array_key_exists($name, $this->attributes);
-    }
-
-    public function get(string $name, mixed $default = null): mixed
-    {
-        return \array_key_exists($name, $this->attributes) ? $this->attributes[$name] : $default;
-    }
-
-    /**
-     * @return void
-     */
-    public function set(string $name, mixed $value)
-    {
-        $this->attributes[$name] = $value;
-    }
-
-    public function all(): array
-    {
-        return $this->attributes;
-    }
-
-    /**
-     * @return void
-     */
-    public function replace(array $attributes)
-    {
-        $this->attributes = [];
-        foreach ($attributes as $key => $value) {
-            $this->set($key, $value);
-        }
-    }
-
-    public function remove(string $name): mixed
-    {
-        $retval = null;
-        if (\array_key_exists($name, $this->attributes)) {
-            $retval = $this->attributes[$name];
-            unset($this->attributes[$name]);
-        }
-
-        return $retval;
-    }
-
-    public function clear(): mixed
-    {
-        $return = $this->attributes;
-        $this->attributes = [];
-
-        return $return;
-    }
-
-    /**
-     * Returns an iterator for attributes.
-     *
-     * @return \ArrayIterator<string, mixed>
-     */
-    public function getIterator(): \ArrayIterator
-    {
-        return new \ArrayIterator($this->attributes);
-    }
-
-    /**
-     * Returns the number of attributes.
-     */
-    public function count(): int
-    {
-        return \count($this->attributes);
-    }
-}