flake.lock: Update

Flake lock file updates:

• Updated input 'backend':
    'github:Bootstrap-Academy/backend/778befb98f15404aa4dc65ce7a5b79f0844e5019?narHash=sha256-RLf7ZCOHHsAgKI82el0Hv2RSgAJYNj90ZJsU573pXBk%3D' (2026-01-29)
  → 'github:Bootstrap-Academy/backend/54bba0127afb25f3781b442a06acb8f1b1f2f9d4?narHash=sha256-16LnLxBWqUoaVEutYM374mLzaYC0tavuVqt9%2BBzZfaM%3D' (2026-02-05)
• Updated input 'backend-develop':
    'github:Bootstrap-Academy/backend/778befb98f15404aa4dc65ce7a5b79f0844e5019?narHash=sha256-RLf7ZCOHHsAgKI82el0Hv2RSgAJYNj90ZJsU573pXBk%3D' (2026-01-29)
  → 'github:Bootstrap-Academy/backend/54bba0127afb25f3781b442a06acb8f1b1f2f9d4?narHash=sha256-16LnLxBWqUoaVEutYM374mLzaYC0tavuVqt9%2BBzZfaM%3D' (2026-02-05)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/fa83fd837f3098e3e678e6cf017b2b36102c7211?narHash=sha256-e7VO/kGLgRMbWtpBqdWl0uFg8Y2XWFMdz0uUJvlML8o%3D' (2026-01-28)
  → 'github:NixOS/nixpkgs/23d72dabcb3b12469f57b37170fcbc1789bd7457?narHash=sha256-z5NJPSBwsLf/OfD8WTmh79tlSU8XgIbwmk6qB1/TFzY%3D' (2026-02-07)
• Updated input 'nixpkgs-unstable':
    'github:NixOS/nixpkgs/bfc1b8a4574108ceef22f02bafcf6611380c100d?narHash=sha256-msG8SU5WsBUfVVa/9RPLaymvi5bI8edTavbIq3vRlhI%3D' (2026-01-26)
  → 'github:NixOS/nixpkgs/00c21e4c93d963c50d4c0c89bfa84ed6e0694df2?narHash=sha256-AYqlWrX09%2BHvGs8zM6ebZ1pwUqjkfpnv8mewYwAo%2BiM%3D' (2026-02-04)
• Updated input 'sandkasten':
    'git+https://radicle.defelo.de/zKBbWZxz73j7BZMbutM7TMMT4v5K.git?ref=refs/heads/develop&rev=a915a6f8dd4e113e4f62fc3ba3cefa60ece6f26a' (2026-01-26)
  → 'git+https://radicle.defelo.de/zKBbWZxz73j7BZMbutM7TMMT4v5K.git?ref=refs/heads/develop&rev=c79fd63f9345b519419e1fd7e900a3ee8858d846' (2026-02-02)
• Updated input 'sandkasten/crane':
    'github:ipetkov/crane/0314e365877a85c9e5758f9ea77a9972afbb4c21?narHash=sha256-gABuYA6BzoRMLuPaeO5p7SLrpd4qExgkwEmYaYQY4bM%3D' (2026-01-24)
  → 'github:ipetkov/crane/b2f45c3830aa96b7456a4c4bc327d04d7a43e1ba?narHash=sha256-DrBaNpZ%2BsJ4stXm%2B0nBX7zqZT9t9P22zbk6m5YhQxS4%3D' (2026-01-30)
• Updated input 'sandkasten/nixpkgs-stable':
    'github:NixOS/nixpkgs/1cd347bf3355fce6c64ab37d3967b4a2cb4b878c?narHash=sha256-Mjx6p96Pkefks3%2BaA%2B72lu1xVehb6mv2yTUUqmSet6Q%3D' (2026-01-25)
  → 'github:NixOS/nixpkgs/41e216c0ca66c83b12ab7a98cc326b5db01db646?narHash=sha256-I7Lmgj3owOTBGuauy9FL6qdpeK2umDoe07lM4V%2BPnyA%3D' (2026-01-31)
• Updated input 'sandkasten/nixpkgs-unstable':
    'github:NixOS/nixpkgs/48698d12cc10555a4f3e3222d9c669b884a49dfe?narHash=sha256-yxgb4AmkVHY5OOBrC79Vv6EVd4QZEotqv%2B6jcvA212M%3D' (2026-01-25)
  → 'github:NixOS/nixpkgs/f214de98544a6acf0d9917ba265ac50849048fcb?narHash=sha256-JwhbEHmbFFH754loOPbpjPHf9EAi%2BoMm2RsFXnlbt1g%3D' (2026-01-31)
• Updated input 'sops-nix':
    'github:Mic92/sops-nix/c5eebd4eb2e3372fe12a8d70a248a6ee9dd02eff?narHash=sha256-wFcr32ZqspCxk4%2BFvIxIL0AZktRs6DuF8oOsLt59YBU%3D' (2026-01-26)
  → 'github:Mic92/sops-nix/17eea6f3816ba6568b8c81db8a4e6ca438b30b7c?narHash=sha256-ktjWTq%2BD5MTXQcL9N6cDZXUf9kX8JBLLBLT0ZyOTSYY%3D' (2026-02-03)
• Updated input 'sops-nix/nixpkgs':
    'github:NixOS/nixpkgs/ab9fbbcf4858bd6d40ba2bbec37ceb4ab6e1f562?narHash=sha256-mAdJpV0e5IGZjnE4f/8uf0E4hQR7ptRP00gnZKUOdMo%3D' (2026-01-24)
  → 'github:NixOS/nixpkgs/6308c3b21396534d8aaeac46179c14c439a89b8a?narHash=sha256-xKPyJoMoXfXpDM5DFDZDsi9PHArf2k5BJjvReYXoFpM%3D' (2026-01-30)

Author: Defelo