Supervisor and Autoscale Skill

Procedure:

1. Introduce ManagedEndpointPool, EndpointTemplate, EndpointInstance, and EndpointLease.
2. Implement Windows Job Object based process supervision.
3. Add readiness probes and health states.
4. Add lease assignment for stable logical endpoints.
5. Add scale-out thresholds: active leases, queue wait, inflight requests, saturation.
6. Add drain behavior. Existing stateful sessions remain sticky; new sessions route to healthier/newer instances.
7. Do not hot-migrate active MCP sessions unless a backend-specific migration contract exists.
8. Add failure/restart behavior.
9. Add tests for lease assignment, drain, restart, and scale-out decisions.

Output must include state diagrams or tables for instance lifecycle and lease lifecycle.