- Add withTempDir helper for test cleanup
- Test all 4 resolveServerScript paths (env var priority, dev mode, compiled binary, legacy fallback)
- Fix flaky CLI lifecycle test: strip CONDUCTOR_PORT to avoid port collision
- Add CONDUCTOR_PORT deterministic port derivation test
- Add setup script rebuild detection integration test
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>