Fix large Cua release pages and isolate hook fixtures

Feed GitHub release pages to jq through stdin so real pages do not exceed Linux argument limits. Generate an oversized fixture response in the curl mock, and run hook fixtures against a temporary pinned PKGBUILD so routine package updates do not break repository self-tests.

Co-Authored-By: Codex GPT-6 XHigh <noreply@openai.com>

pkgbuilds/cua-driver-bin/.omarchy/upstream.sh

@@ -21,7 +21,7 @@ for ((page = 1; page <= max_pages; page++)); do
     echo "invalid release feed for $REPO on page $page" >&2
     exit 1
   fi
-  releases=$(jq -c --argjson page "$release_page" '. + $page' <<<"$releases")
+  releases=$(printf '%s\n' "$releases" "$release_page" | jq -cs 'add')
   (( page_size == 100 )) || break
 done
 if (( page > max_pages )); then