Summary

• Add openclaw-checks.yml workflow that runs lint (tsc --noEmit), tests with coverage (vitest run
  --coverage), and build verification (tsup) for the openclaw/ folder
• Triggers on push to main, PRs touching openclaw/**, and manual workflow_dispatch
• Tests run across Node 20 and 22; lint and build run on Node 20
• Add @vitest/coverage-v8 to devDependencies to support coverage reporting

Test plan

• Trigger workflow manually from the Actions tab and verify all 3 jobs pass
• Open a PR touching only openclaw/ and confirm openclaw checks triggers (and CI does not)
• Open a PR touching only mem0/ and confirm ci triggers (and openclaw checks do not)
• Verify coverage uploads to Codecov with the openclaw flag