Changes:
1. Fix reportAgentState in prime.go to use beads API directly instead of
non-existent `bd agent state` command. Agents now properly self-report
their state to their agent beads on startup.
2. Update witness patrol survey-workers step to use agent beads:
- List polecats via `bd list --type=agent --json`
- Filter by role_type: polecat in description
- Check agent_state field (running/idle/stuck/done)
- Trust agent-reported state (ZFC principle)
No more PID/tmux inference for polecat state - agents self-report.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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