refactor(gitea): make GiteaProvider fetch non-blocking

startFetch() fires the heatmap GET and returns the response without
reading it; resolveFetch() does the .toArray()/parse/log work.

src/Service/Provider/GiteaProvider.php

@@ -6,6 +6,7 @@ namespace App\Service\Provider;
 
 use Psr\Log\LoggerInterface;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\HttpClient\ResponseInterface;
 
 /**
  * Fetches contribution data from the Gitea heatmap endpoint.
@@ -46,20 +47,24 @@ final class GiteaProvider implements ProviderInterface
         ])->getContent();
     }
 
-    /**
+    public function startFetch(): ResponseInterface
-     * @return array<string, int>  date (Y-m-d) => contribution count
-     */
-    public function fetch(): array
     {
         $baseUrl = rtrim($this->baseUrl, '/');
 
         $this->logger->debug('GiteaProvider: fetching contributions', ['user' => $this->username, 'url' => $baseUrl]);
 
-        $response = $this->client->request('GET', "$baseUrl/api/v1/users/{$this->username}/heatmap", [
+        return $this->client->request('GET', "$baseUrl/api/v1/users/{$this->username}/heatmap", [
             'headers' => ['Authorization' => "token {$this->token}"],
         ]);
+    }
 
-        $data   = $response->toArray();
+    /**
+     * @return array<string, int>  date (Y-m-d) => contribution count
+     */
+    public function resolveFetch(mixed $handle): array
+    {
+        /** @var ResponseInterface $handle */
+        $data   = $handle->toArray();
         $cutoff = (new \DateTimeImmutable('-365 days'))->getTimestamp();
         $result = [];