chore: update flake.lock

Flake lock file updates:

• Updated input 'crane':
    'github:ipetkov/crane/6c23998' (2026-04-03)
  → 'github:ipetkov/crane/7cf72d9' (2026-04-10)
• Updated input 'nix2container':
    'github:nlewo/nix2container/20d3395' (2026-03-20)
  → 'github:nlewo/nix2container/76be960' (2026-04-06)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/36a6011' (2026-04-04)
  → 'github:NixOS/nixpkgs/54170c5' (2026-04-10)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/61747bc' (2026-04-06)
  → 'github:oxalica/rust-overlay/3c27f4c' (2026-04-13)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/7592596' (2026-04-02)
  → 'github:numtide/treefmt-nix/790751f' (2026-04-08)
• Updated input 'uv2nix':
    'github:pyproject-nix/uv2nix/3cffcee' (2026-04-05)
  → 'github:pyproject-nix/uv2nix/5707df9' (2026-04-09)

Author: github-actions[bot]