Enable Discovery debug logging for production troubleshooting

- Add DISCOVERY_LOG_LEVEL=debug
- Add DISCOVERY_SHOW_PROGRESS=true
- Temporary changes for debugging InitializerProcessor fixes on production

tests/bootstrap.php

@@ -0,0 +1,6 @@
+<?php
+
+declare(strict_types=1);
+
+// Bootstrap file for PHPStan and tests
+require_once __DIR__ . '/../vendor/autoload.php';