Release v0.5.0

[heskew]

Bumps the package to v0.5.0 for release (the #9 fix is on main). Version-only change — package.json + package-lock.json.

v0.5.0

• Startup: idle-based readiness watchdog (resets on output) + CI-aware absolute cap, replacing the single wall-clock deadline. New startupMaxMs / HARPER_INTEGRATION_TEST_STARTUP_MAX_MS.
• Teardown: kill Harper's whole process tree and wait for exit before recycling the loopback address — fixes EADDRINUSE on the next suite. New …_TEARDOWN_GRACE_MS / …_PORT_RELEASE_TIMEOUT_MS.
• ⚠️ Behavior change: startupTimeoutMs now means the idle / no-output window, not an absolute deadline — use startupMaxMs for a hard ceiling.
• First node:test unit suite; devEngines now requires Node ≥ 22.18.

After merge: git tag v0.5.0 && git push --tags && npm publish (don't re-run npm version — the bump is already in).

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[gemini-code-assist]

Code Review

This pull request updates the version of the @harperfast/integration-testing package from 0.4.0 to 0.5.0 in both package.json and package-lock.json. There are no review comments, and I have no feedback to provide.

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