Replace weak "If You're Stuck" section with comprehensive escalation
guidance including:
- When to escalate (specific scenarios)
- How to escalate (gt escalate, mail to Witness, mail to Mayor)
- What to do after escalating (continue or exit cleanly)
- Anti-pattern example showing wrong vs right approach
This prevents polecats from filing beads and passively waiting for
human input, which caused them to appear stuck in sessions.
Fixes: hq-t8zy
45de02db43