chore: import upstream snapshot with attribution

tests/fixtures/sample.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace App\Http;
+
+use App\Auth\Authenticator;
+use App\Cache\CacheManager;
+
+class ApiClient
+{
+    private string $baseUrl;
+    private Authenticator $auth;
+
+    public function __construct(string $baseUrl)
+    {
+        $this->baseUrl = $baseUrl;
+        $this->auth = new Authenticator();
+    }
+
+    public function get(string $path): string
+    {
+        return $this->fetch($path, 'GET');
+    }
+
+    public function post(string $path, string $body): string
+    {
+        return $this->fetch($path, 'POST');
+    }
+
+    private function fetch(string $path, string $method): string
+    {
+        $token = $this->auth->getToken();
+        return $method . ' ' . $this->baseUrl . $path;
+    }
+}
+
+interface Loggable
+{
+    public function log(): void;
+}
+
+trait HasName
+{
+    public function getName(): string
+    {
+        return '';
+    }
+}
+
+class BaseProcessor {}
+
+class Result {}
+
+class DataProcessor extends BaseProcessor implements Loggable
+{
+    use HasName;
+
+    private Result $current;
+
+    public function run(DataProcessor $input): Result
+    {
+        return new Result();
+    }
+
+    public function log(): void
+    {
+    }
+}
+
+class Service
+{
+    public function __construct(private Result $result, string $label)
+    {
+    }
+}
+
+function parseResponse(string $raw): array
+{
+    return json_decode($raw, true);
+}