Release 3.13.1 (2025-11-12)

• Based on upstream Nix 2.32.4.

What's Changed

• nix bundle: Wait for async path writer by @edolstra in DeterminateSystems/nix-src#260
• Sync with upstream 2.32.4 by @edolstra in DeterminateSystems/nix-src#261

Full Changelog: v3.13.0...v3.13.1