Port the review feedback from the main-line PR (#1088) into the v5 backport: - src/cache.ts: use the STATE_CACHE_PRIMARY_KEY constant for the output name instead of a duplicated string literal - action.yml / README.md: clarify that the output is also empty when caching is skipped (e.g. the cache service is unavailable) - dist: rebuild Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>