keyed 0.2.0: watch/unwatch, cell-level drift, diff engine

Release 0.1.1

Fix CI: add Remotes field for joinspy dependency

joinspy is only available on GitHub, not CRAN.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>