6 pooling

use Cognesy\Http\Collections\HttpRequestList;
use Cognesy\Http\Data\HttpRequest;

$requests = HttpRequestList::of(
    new HttpRequest(url: 'https://api.example.com/a', method: 'GET', headers: [], body: '', options: []),
    new HttpRequest(url: 'https://api.example.com/b', method: 'GET', headers: [], body: '', options: []),
);

// Access methods
$requests->count();    // 2
$requests->first();    // First HttpRequest
$requests->last();     // Last HttpRequest
$requests->isEmpty();  // false
$requests->all();      // Array of all requests

// Immutable mutation
$requests = $requests->withAppended($newRequest);
$requests = $requests->filter(fn($r) => $r->method() === 'POST');
// @doctest id="992b"

use Cognesy\Http\Collections\HttpResponseList;

// After pool execution, you get an HttpResponseList
$responses->count();          // Total results
$responses->successful();     // Array of HttpResponse objects
$responses->failed();         // Array of error values
$responses->hasFailures();    // true if any request failed
$responses->successCount();   // Number of successful responses
$responses->failureCount();   // Number of failed responses
// @doctest id="1d00"