Adapt to roach-php/core 3.2 + Symfony ^7.0 (PHP >= 8.2)

[Azmandios]

Summary

• Require roach-php/core ^3.2 (was ~1.1.0), symfony/* ^7.0 (was ^6.0), php >=8.2 (was >=8.0).
• Register the two downloader middlewares introduced in roach-php 3.x in services.php:
  • HttpErrorMiddleware (RoachPHP\Downloader\Middleware\HttpErrorMiddleware, ctor: (LoggerInterface)) — drops responses with unallowed HTTP status, configured per spider via the handleStatus option;
  • ProxyMiddleware (RoachPHP\Downloader\Middleware\ProxyMiddleware, ctor: (ContainerInterface, LoggerInterface)) — assigns proxies to requests, configured per spider via the proxy / loader options.
• Remove psalm dev-dependencies (vimeo/psalm, psalm/plugin-symfony, psalm/plugin-phpunit): psalm 4.x requires symfony/console <=6, incompatible with symfony ^7.0. The psalm step needs either psalm 5/6 upgrade or removal (kept out of scope of this PR).

Compatibility

The bundle is a thin wrapper (RoachPhpBundle::boot() → Roach::useContainer()). Verified against roach-php/core v3.2.1: constructor signatures of all services previously registered in services.php (Engine, Processor, RequestDeduplicationMiddleware, ExecuteJavascriptMiddleware, CookieMiddleware, StatsCollectorExtension, Downloader, ItemPipeline, Client, Runner, ArrayRequestScheduler, SystemClock, extensions, built-in middlewares) are unchanged since 1.x. Roach::useContainer(), Roach::startSpider(), Roach::collectSpider() and Overrides signatures are unchanged. RunSpiderCommand (roach:run) works as before.

Testing

• composer update resolves cleanly on PHP 8.4: roach-php/core 3.2.1, symfony/console 7.4.x, symfony/serializer 7.4.x, symfony/maker-bundle 1.68, monolog 3.12, nyholm/psr 1.8.
• composer install --dry-run — nothing to install (stable resolution).
• php -l clean on all changed files.

Notes for maintainers

• .github/workflows/build.yml still pins php 8.0/8.1 and symfony_version: 6.0.* and runs psalm — it will need a follow-up matrix update (php >= 8.2, symfony 7.*) and either psalm 5+ or removal of the psalm step. Kept out of this PR to keep the diff minimal.
• jakeasmith/http_build_url (pulled by core 3.2.1) is abandoned — upstream core concern, not bundle's.