Docs: add a run-in-console debugging walkthrough

[peopleworks]

What

Expand the docs with a short run-in-console for debugging walkthrough: how to launch the service as a plain console app, watch live logs, and stop cleanly — versus installing it as a Windows Service.

Why

New contributors and evaluators want to try it fast without installing a service. A clear console path lowers the barrier.

Suggested approach

• Add a subsection to CONTRIBUTING.md (and/or the README Quick start).
• Cover: build, run as console, where logs go, how to trigger a job, and Ctrl+C shutdown.

Acceptance criteria

• Step-by-step console run documented
• Notes the difference vs. running as a Windows Service
• Copy-paste commands that work on a clean checkout

Documentation good-first-issue — comment to claim it.