Implements structured escalation channel for Gas Town: - gt escalate command with CRITICAL/HIGH/MEDIUM severity levels - Mayor startup check for pending escalations - Escalation beads with tag for audit trail - Mail routing to overseer with priority mapping - Documentation in docs/escalation.md 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>