The eightpoints/guzzle-bundle and idci/graphql-client-bundle only
existed to build one near-static query string, and the bundle's own
HTTP transport was already bypassed in favor of Symfony HttpClient.
Build the query with sprintf/json_encode instead, drop both bundles
from config/bundles.php, and update the test double accordingly.
Move all provider-related classes, enums, interface and trait into
App\Service\Provider; move SvgRenderer into App\Service\Renderer.
ContributionAggregator stays at the Service root as the orchestrator.
Test namespaces and use statements updated to match.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>