Remove Stats fields from witness and refinery types that tracked
observable metrics (total counts, today counts). These are now
handled by the activity stream/beads system instead.
Removed:
- WitnessStats type and Stats field from Witness
- RefineryStats type and Stats field from Refinery
- LastCheckAt field from Witness
- Stats display from gt witness status
- Stats display from gt refinery status
- Stats increment code from refinery.completeMR()
Kept minimal process state:
- RigName, State, PID, StartedAt (both)
- MonitoredPolecats, Config, SpawnedIssues (witness)
- CurrentMR, PendingMRs, LastMergeAt (refinery)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>