chore(controller): lower set_time_limit now that fetching is concurrent

Providers fetch in parallel now (cost ~= max, not sum), so the old
90s stopgap for the 3-sequential-providers-plus-pagination worst case
can come back down toward the 30s default, with headroom for
pagination and per-request HTTP timeouts.

src/Controller/GraphController.php

@@ -53,6 +53,7 @@ final class GraphController
         $svg = $this->cache->get($cacheKey, function (ItemInterface $item) use ($theme, &$cacheMiss): string {
             $cacheMiss = true;
             $item->expiresAfter(3600);
+            set_time_limit(30); // ponytail: providers fetch concurrently now (cost ~= max, not sum); GitLab pagination + per-request HTTP timeout (framework.yaml) still need headroom over the 30s default
 
             return $this->renderer->render($this->aggregator->aggregate(), $theme);
         });