fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

src/Framework/ExceptionHandling/ExceptionHandlerManager.php

@@ -3,19 +3,37 @@ declare(strict_types=1);
 
 namespace App\Framework\ExceptionHandling;
 
-use App\Framework\Config\EnvironmentType;
-use App\Framework\ExceptionHandling\Strategy\ErrorPolicyResolver;
-
+/**
+ * Manages global exception, error, and shutdown handlers
+ *
+ * Supports early registration with basic handlers before Discovery,
+ * and replacement with full handlers after Discovery.
+ */
 final readonly class ExceptionHandlerManager
 {
-    public function __construct()
+    public function __construct(
+        private ErrorHandlerInterface $errorHandler,
+        private ExceptionHandler $exceptionHandler,
+        private ShutdownHandlerInterface $shutdownHandler
+    ) {
+        $this->registerErrorHandler($this->errorHandler);
+        $this->registerExceptionHandler($this->exceptionHandler);
+        $this->registerShutdownHandler($this->shutdownHandler);
+    }
+
+    /**
+     * Create ExceptionHandlerManager with basic handlers for early registration
+     *
+     * This factory method creates a manager with minimal handlers that don't
+     * require full dependencies. Useful for registering handlers before Discovery.
+     */
+    public static function createWithBasicHandlers(): self
     {
-        $resolver = new ErrorPolicyResolver();
-        $this->registerErrorHandler(new ErrorHandler($resolver->resolve(EnvironmentType::DEV)));
-
-        $this->registerExceptionHandler(new GlobalExceptionHandler());
-
-        $this->registerShutdownHandler(new ShutdownHandler());
+        return new self(
+            new BasicErrorHandler(),
+            new BasicGlobalExceptionHandler(),
+            new BasicShutdownHandler()
+        );
     }
 
     public function registerExceptionHandler(ExceptionHandler $handler): void
@@ -23,12 +41,12 @@ final readonly class ExceptionHandlerManager
         set_exception_handler($handler->handle(...));
     }
 
-    private function registerErrorHandler(ErrorHandler $handler):void
+    private function registerErrorHandler(ErrorHandlerInterface $handler): void
     {
         set_error_handler($handler->handle(...), E_ALL);
     }
 
-    public function registerShutdownHandler(ShutdownHandler $handler): void
+    public function registerShutdownHandler(ShutdownHandlerInterface $handler): void
     {
         register_shutdown_function($handler->handle(...));
     }