chore(nix): update `flake.lock`
Flake lock file updates:
• Updated input 'advisory-db':
'github:rustsec/advisory-db/930c3aa' (2026-04-25)
→ 'github:rustsec/advisory-db/881a159' (2026-05-07)
• Updated input 'blockfrost-tests':
'github:blockfrost/blockfrost-tests/ee42a8a' (2026-04-24)
→ 'github:blockfrost/blockfrost-tests/fd5a2ba' (2026-05-07)
• Updated input 'crane':
'github:ipetkov/crane/60c8293' (2026-04-25)
→ 'github:ipetkov/crane/6d015ea' (2026-05-06)
• Updated input 'fenix':
'github:nix-community/fenix/f374034' (2026-04-25)
→ 'github:nix-community/fenix/f54d645' (2026-05-09)
• Updated input 'fenix/rust-analyzer-src':
'github:rust-lang/rust-analyzer/8954b66' (2026-04-21)
→ 'github:rust-lang/rust-analyzer/73ca1d4' (2026-05-08)
• Updated input 'flake-parts':
'github:hercules-ci/flake-parts/3107b77' (2026-04-01)
→ 'github:hercules-ci/flake-parts/0678d89' (2026-05-05)
• Updated input 'flake-parts/nixpkgs-lib':
'github:nix-community/nixpkgs.lib/333c4e0' (2026-03-29)
→ 'github:nix-community/nixpkgs.lib/f590132' (2026-04-26)
• Updated input 'nixpkgs':
'github:nixos/nixpkgs/10e7ad5' (2026-04-21)
→ 'github:nixos/nixpkgs/0c88e1f' (2026-05-05)