Structured telemetry logfire

<?php
require 'examples/boot.php';

use Cognesy\Config\Env;
use Cognesy\Events\Dispatchers\EventDispatcher;
use Cognesy\Http\Telemetry\HttpClientTelemetryProjector;
use Cognesy\Instructor\StructuredOutput;
use Cognesy\Instructor\StructuredOutputRuntime;
use Cognesy\Instructor\Telemetry\InstructorTelemetryProjector;
use Cognesy\Polyglot\Inference\LLMProvider;
use Cognesy\Polyglot\Telemetry\PolyglotTelemetryProjector;
use Cognesy\Telemetry\Adapters\Logfire\LogfireConfig;
use Cognesy\Telemetry\Adapters\Logfire\LogfireExporter;
use Cognesy\Telemetry\Application\Registry\TraceRegistry;
use Cognesy\Telemetry\Application\Telemetry;
use Cognesy\Telemetry\Application\Projector\CompositeTelemetryProjector;
use Cognesy\Telemetry\Application\Projector\RuntimeEventBridge;

class SupportTicket
{
    public string $priority;
    public string $summary;
}

$serviceName = 'examples.a03.telemetry-logfire';
$token = (string) Env::get('LOGFIRE_TOKEN', '');
if ($token === '') {
    throw new RuntimeException('Set LOGFIRE_TOKEN in .env to run this example.');
}
$endpoint = (string) Env::get('LOGFIRE_OTLP_ENDPOINT', '');
if ($endpoint === '') {
    throw new RuntimeException('Set LOGFIRE_OTLP_ENDPOINT in .env to run this example.');
}

$events = new EventDispatcher($serviceName);
$hub = new Telemetry(
    registry: new TraceRegistry(),
    exporter: new LogfireExporter(new LogfireConfig(
        endpoint: rtrim($endpoint, '/'),
        serviceName: $serviceName,
        headers: ['Authorization' => $token],
    )),
);

(new RuntimeEventBridge(new CompositeTelemetryProjector([
    new InstructorTelemetryProjector($hub),
    new PolyglotTelemetryProjector($hub),
    new HttpClientTelemetryProjector($hub),
])))->attachTo($events);

$runtime = StructuredOutputRuntime::fromProvider(
    provider: LLMProvider::using('openai'),
    events: $events,
);

$ticket = (new StructuredOutput($runtime))
    ->with(
        messages: 'Customer report: The checkout page returns a 500 error after payment. Treat this as urgent and summarize it in one sentence.',
        responseModel: SupportTicket::class,
    )
    ->get();

$hub->flush();

echo "Priority: {$ticket->priority}\n";
echo "Summary: {$ticket->summary}\n";
echo "Telemetry: flushed to Logfire\n";

assert($ticket->priority !== '');
assert($ticket->summary !== '');
?>