Implements auto-triggering of polecats after spawn:
- New pending.go in deacon package tracks pending spawns
- CheckInboxForSpawns reads POLECAT_STARTED messages
- TriggerPendingSpawns polls WaitForClaudeReady and nudges when ready
- PruneStalePending removes spawns older than 5 minutes
The Deacon can now call `gt deacon trigger-pending` during patrol to
automatically send "Begin." to newly spawned polecats once Claude is ready.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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