chore: release 0.3.29

[cafitac]

Summary

• fix agent-learner update to pin global installs to the prefix inferred from the installed wrapper location
• extend the wrapper regression test to cover the real deployed failure shape: wrapper under an nvm-style prefix, node from another PATH entry, and a stale /usr/local global prefix
• release version 0.3.29 so deployed installs can self-update without falling back into /usr/local

Test Plan

• node --test test/wrapper.test.cjs --test-name-pattern='runWrapperUpdate prefers the npm next to the wrapper script and pins installs to that wrapper prefix'
• npm test
• PYTHONPATH=src .venv/bin/python -m pytest -q
• reproduced deployed 0.3.28 behavior locally: selected nvm npm but still failed with EACCES because npm global prefix remained /usr/local