Release v3.15.0 (#151)

* Prepare release v3.15.0

* Update determinate-nixd binaries to v3.15.0

* flake.lock: Update

Flake lock file updates:

• Updated input 'determinate-nixd-aarch64-darwin':
    'https://install.determinate.systems/determinate-nixd/tag/v3.14.0/macOS'
  → 'https://install.determinate.systems/determinate-nixd/tag/v3.15.0/macOS'
• Updated input 'determinate-nixd-aarch64-linux':
    'https://install.determinate.systems/determinate-nixd/tag/v3.14.0/aarch64-linux'
  → 'https://install.determinate.systems/determinate-nixd/tag/v3.15.0/aarch64-linux'
• Updated input 'determinate-nixd-x86_64-linux':
    'https://install.determinate.systems/determinate-nixd/tag/v3.14.0/x86_64-linux'
  → 'https://install.determinate.systems/determinate-nixd/tag/v3.15.0/x86_64-linux'
• Updated input 'nix':
    'https://api.flakehub.com/f/pinned/DeterminateSystems/nix-src/3.14.0/019b0159-8907-7fab-a120-9d287c7e6d2e/source.tar.gz' (2025-12-09)
  → 'https://api.flakehub.com/f/pinned/DeterminateSystems/nix-src/3.15.0/019b3854-cca6-7298-a91c-0fd8551a7270/source.tar.gz' (2025-12-19)
• Updated input 'nixpkgs':
    'https://api.flakehub.com/f/pinned/DeterminateSystems/nixpkgs-weekly/0.1.905078%2Brev-8c29968b3a942f2903f90797f9623737c215737c/019add91-3add-7a0d-8a25-9569cbe01efe/source.tar.gz' (2025-12-01)
  → 'https://api.flakehub.com/f/pinned/DeterminateSystems/nixpkgs-weekly/0.1.911985%2Brev-09b8fda8959d761445f12b55f380d90375a1d6bb/019b25ab-7c11-79e0-a0b0-c94d455b7190/source.tar.gz' (2025-12-15)

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

flake.lock

@@ -6,15 +6,15 @@
     nixpkgs.url = "https://flakehub.com/f/DeterminateSystems/nixpkgs-weekly/0.1";
 
     determinate-nixd-aarch64-linux = {
-      url = "https://install.determinate.systems/determinate-nixd/tag/v3.14.0/aarch64-linux";
+      url = "https://install.determinate.systems/determinate-nixd/tag/v3.15.0/aarch64-linux";
       flake = false;
     };
     determinate-nixd-x86_64-linux = {
-      url = "https://install.determinate.systems/determinate-nixd/tag/v3.14.0/x86_64-linux";
+      url = "https://install.determinate.systems/determinate-nixd/tag/v3.15.0/x86_64-linux";
       flake = false;
     };
     determinate-nixd-aarch64-darwin = {
-      url = "https://install.determinate.systems/determinate-nixd/tag/v3.14.0/macOS";
+      url = "https://install.determinate.systems/determinate-nixd/tag/v3.15.0/macOS";
       flake = false;
     };
   };