[AndWeHaveAPlan]

Fixes

• Poller: per-tray failures (SetJob/DeleteTray/scaling) are logged and counted instead of returned, so one transient error no longer tears down the GitHub session and drops job events. New metric use: cattery_scaleset_poll_errors
• Leader election: restarter and stale-tray cleanup now run under leases (cattery-restarter, cattery-stale-trays) instead of on every replica
• Lease renewal: transient renew errors keep leadership until the TTL lapses; a stalled or failing store steps down exactly at expiry (no more split-brain window)
• Nomad: insecure: true (unquoted) was ignored; now parsed with ParseBool

Docs & examples

• README, docs/configuration.md: fixed stale-cleanup description, config search order, /agent/download route, provider list, Go version, App permissions; documented stale and coordination; removed unused namePrefix/project tray fields; maxTrays marked required; agentSecret marked as not yet supported by the agent
• examples/example-config.yaml now loads (bad provider/org references, dead keys). example.md rewritten for the scale-set flow. Dockerfile-cattery-tiny builds with Go 1.26 (multi-stage)