Unified park/escalate handoff management with snapshot generation,
AI diagnostic assessment for escalations (via _call_ai), claim workflow
that reactivates sessions, PSA push via existing psa_documentation_service,
and team queue query. Dual-writes to ai_sessions.escalation_package for
backward compatibility.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
