chore(nix): update `flake.lock`
Flake lock file updates:
• Updated input 'advisory-db':
'github:rustsec/advisory-db/f9b2158' (2026-04-17)
→ 'github:rustsec/advisory-db/930c3aa' (2026-04-25)
• Updated input 'blockfrost-tests':
'github:blockfrost/blockfrost-tests/3bedc5f' (2026-04-14)
→ 'github:blockfrost/blockfrost-tests/ee42a8a' (2026-04-24)
• Updated input 'crane':
'github:ipetkov/crane/e24d86e' (2026-04-18)
→ 'github:ipetkov/crane/60c8293' (2026-04-25)
• Updated input 'fenix':
'github:nix-community/fenix/df22953' (2026-04-18)
→ 'github:nix-community/fenix/f374034' (2026-04-25)
• Updated input 'fenix/rust-analyzer-src':
'github:rust-lang/rust-analyzer/251df51' (2026-04-17)
→ 'github:rust-lang/rust-analyzer/8954b66' (2026-04-21)
• Updated input 'nixpkgs':
'github:nixos/nixpkgs/e07580d' (2026-04-19)
→ 'github:nixos/nixpkgs/10e7ad5' (2026-04-21)