The Witness handlers (HandlePolecatDone, HandleMerged, etc.) existed in Go
code but were never called - there was no CLI command to invoke them.
This caused polecats to remain in 'done' state after MR merge because
POLECAT_DONE messages were never processed.
Changes:
- Add `gt witness process <rig>` command to process Witness mail
- Fix --wisp flag to --ephemeral in cleanup wisp creation
- Command processes POLECAT_DONE, MERGED, HELP, SWARM_START messages
- Auto-nukes clean polecats, creates cleanup wisps for dirty ones
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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