v0.9.0

Changed

• BREAKING: the project is renamed from game-lattice to doc-lattice. The engine was never
  game-specific; the name now matches its general purpose. In one release this renames the
  repository (https://github.com/Guardantix/doc-lattice, with GitHub redirects from the old
  URL), the distribution and package (doc-lattice / doc_lattice), the CLI executable
  (doc-lattice), the config file (only .doc-lattice.yml is recognized; no fallback), and
  the opt-in load-cache location (<cache_home>/doc-lattice/; old cache directories are
  orphaned and safe to delete). Doc sets themselves need no edits; lattice frontmatter
  (id, derives_from, authority, seen) is unchanged.

Migration (v0.8.x to v0.9.0)

Nothing breaks until you bump your pin: checked-in gates pin a tag
(uvx --from git+.../game-lattice@v0.8.0 game-lattice ...) and GitHub's rename redirect keeps
that resolving indefinitely. Upgrading the pin to v0.9.0 requires, in one commit:

1. Rename .game-lattice.yml to .doc-lattice.yml (contents unchanged).
2. Regenerate the checked-in pre-commit hook and CI workflow (re-run doc-lattice init
   codegen, or by hand update the repo URL, the @v0.9.0 pin, and the executable name
   game-lattice to doc-lattice in each invocation).
3. Any Python code importing game_lattice switches to doc_lattice (the package is not on
   PyPI and no import consumers are known; listed for completeness).