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/console/Output/TrimmedBufferOutput.php

@@ -1,61 +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\Console\Output;
-
-use Symfony\Component\Console\Exception\InvalidArgumentException;
-use Symfony\Component\Console\Formatter\OutputFormatterInterface;
-
-/**
- * A BufferedOutput that keeps only the last N chars.
- *
- * @author Jérémy Derussé <jeremy@derusse.com>
- */
-class TrimmedBufferOutput extends Output
-{
-    private int $maxLength;
-    private string $buffer = '';
-
-    public function __construct(int $maxLength, ?int $verbosity = self::VERBOSITY_NORMAL, bool $decorated = false, ?OutputFormatterInterface $formatter = null)
-    {
-        if ($maxLength <= 0) {
-            throw new InvalidArgumentException(sprintf('"%s()" expects a strictly positive maxLength. Got %d.', __METHOD__, $maxLength));
-        }
-
-        parent::__construct($verbosity, $decorated, $formatter);
-        $this->maxLength = $maxLength;
-    }
-
-    /**
-     * Empties buffer and returns its content.
-     */
-    public function fetch(): string
-    {
-        $content = $this->buffer;
-        $this->buffer = '';
-
-        return $content;
-    }
-
-    /**
-     * @return void
-     */
-    protected function doWrite(string $message, bool $newline)
-    {
-        $this->buffer .= $message;
-
-        if ($newline) {
-            $this->buffer .= \PHP_EOL;
-        }
-
-        $this->buffer = substr($this->buffer, 0 - $this->maxLength);
-    }
-}