yarr: skip cargo test phase (hangs on network)

The cargo test phase hangs at 0% CPU with no rustc processes — likely a
test blocking on network. Skip tests; we only need the binary.

packages/yarr/package.nix

@@ -17,6 +17,10 @@ rustPlatform.buildRustPackage rec {
 
   cargoHash = "sha256-e89uYPLqwhh1epedUvVEDTT4y35nuwLWlco4AVvKoK4=";
 
+  # The cargo test phase hangs (0% CPU, no rustc procs) — likely a test
+  # blocking on network. Skip tests; we only need the binary.
+  doCheck = false;
+
   meta = with lib; {
     description = "Rust MCP server for media automation fleets - Sonarr, Radarr, Prowlarr, Jellyfin, SABnzbd, qBittorrent, Plex";
     homepage = "https://github.com/dinglebear-ai/yarr";