fix(ci): stage docs/llms-full.txt in the release commit so it stops drifting

The release step ran docs:sync (which regenerates README, AGENTS, and docs/llms-full.txt) but only git-added README and AGENTS, so llms-full.txt was never committed by a release and perpetually drifted from the spec, tripping the docs-drift pre-push guard on every later push.

Author: ph33nx

.github/workflows/release.yml

@@ -79,7 +79,7 @@ jobs:
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
           VERSION=$(node -p "require('./package.json').version")
-          git add package.json src/version.ts specs/openapi.json src/ README.md AGENTS.md
+          git add package.json src/version.ts specs/openapi.json src/ README.md AGENTS.md docs/llms-full.txt
           git commit -m "release: v$VERSION"
           git tag "v$VERSION"
           git push --follow-tags