v0.5.0

stats stops trying to analyse and describes instead. Its own analysis produced a confidently wrong answer about runner counts, so the reasoning moved to where it belongs and the command now reports what jobs cost and points at the data.

• contrib/telemetry-join.sh joins recorded telemetry to GitHub, adding the queue times the job hook cannot see. That is the figure that answers whether a pool is too small.
• contrib/demo-status.sh answers status with invented pools, for screenshots and for developing against the JSON without runners or a GitHub account.
• Fixed: shrinking a pool raced the scheduler into standing every pool down (#6).
• Docs: the contention threshold depends on pool size, which the default does not account for.