uptimerunner-basic

This scenario verifies the first concrete uptime.link runner flow:

A target HTTP service responds with healthy.
A fake uptime.link coordinator exposes the runner protocol.
The runner polls /api/runner/v1/checks.
The runner executes the assigned HTTP check locally.
The runner posts the result to /api/runner/v1/results.
The scenario verifies scheduling, status derivation, snapshot restore, unauthorized access rejection, token rotation, disabled runner rejection, and label updates.